TESTIMONY

For

“Mobility, Congestion and Intermodalism”

by

Alan E. Pisarski

independent consultant

before the

UNITED STATES SENATE

Committee on Environment and Public Works

March 19, 2002

Washington D.C.

 

Mr. Chairman, Distinguished members of the Committee, ladies and gentlemen, my name is Alan E. Pisarski, and I am honored to be invited to speak before you once again to address the outlook for American travel.  I recall with pleasure that I participated in your hearings in 1997 in the advent to TEA-21, and also in the first hearing for ISTEA.  It is a responsibility that I take very seriously. 

 

I recall in that first hearing that Senator Moynihan spoke of seeing the New York World’s Fair in 1937 as a youngster and how it affected his sense of the future of transportation.  I related then that I had been there also, my parents had wheeled me thru that fair as a newborn, and I must have acquired some of the same flavor he did.

 

We need to look at the next reauthorization period through the lens of the changes likely to occur between now and the end of the cycle. As the next reauthorized period concludes, delivering us to the doorstep of the year 2010, we will have seen dramatic changes in the first decade of the new century:

 

       We will have crossed 300 million in population at some point midway in the period

       Our rural population alone will be over 60 million, more than many nations

       We will have added more than 25 million people

       And perhaps as many cars as people

       Another 10 million households

       More than 10 million more immigrants

       The first of the baby boomers will be at retirement age.

       13% of the population will be over 65 years of age

       We will have added four trillion dollars or so to our economy

 

 In many respects our world and the transportation system that serves it will be a different place.

 

In reviewing travel trends and their social and economic determinants I like to use the following list of eight elements of transportation. Now more than ever it is critical to keep them in mind.

 

1.     COMMUTING

2.     OTHER LOCAL TRAVEL

3.     TOURISM

4.     SERVICE VEHICLES

5.     PUBLIC VEHICLES

6.     URBAN GOODS MOVEMENT

7.     •THRU PASSENGER TRAVEL

8.     •THRU FREIGHT TRAVEL

 

 

Too often we say we are going to talk about transportation and then we forget freight and talk only about passenger travel; then we say we will talk about passenger travel and end up talking about metropolitan commuting. Then we get into an argument about highways versus transit and get lost in the thickets of advocacy. 

 

We must consider both freight and passenger travel, in both their metropolitan and non-metropolitan forms as the list indicates.  Many of our issues of the future will be centered in freight-passenger conflicts; and intercity-local interactions.

 

 

The Metaphor of the Wilson Bridge

 

One of the difficult problems addressed by the Congress in the recent past has been the Wilson Bridge. It is the perfect symbol of our challenges:

 

       It is a critical commuter corridor in the morning and evening

       A major all day regional connector for passengers and freight

       A major route for buses and private vehicles from Maine to Florida

       A critical freight link in the I-95 corridor – main street of the Northeast

 

It is an aging, heavily-used facility suffering from both functional and physical deficiencies operating in a complex inter-governmental environment.  There are many Wilson bridges in our future.

 

 

 

My focus today will be on taking the long view on the nation’s travel activity trends and demographic future and its implications for future travel.

 

A REPORT ON RECENT TRENDS

 

First a report on where we are with respect to commuting and other travel trends.  I made the mistake of going back and reviewing my testimony five years ago and some of the thoughts I expressed then have been borne out, others need some modifying in the light of the new census data.

 

The changes between 1990 and preliminary 2000 data from the statistics of the Census Bureau are shown in the accompanying table. 

 

Journey to Work Mode Choice Trends

 

1990

2000

 

 

 

DRIVE ALONE

73%

76%

CARPOOL

13%

11%

TRANSIT

5%

5%

TAXI

0%

0%

MOTORCYCLE

0%

0%

BICYCLE

0%

0%

OTHER

1%

1%

WALKED ONLY

4%

3%

WORKED AT HOME

3%

3%

 

In my testimony five years ago I felt that the decline in transit and carpooling had about reached their limits – right on transit – it has just about held share; but carpooling has continued to decline – it is fundamentally now an intra-household activity today – a fampool.  Detailed data from the decennial census coming later this year will help establish the why and how of the decline.

 

I also stated then I expected the single occupant vehicle to have reached a share of commuting about as high as it  was going to go – Wrong! - as you can see, by 3 percentage points, rising from 73% to 76% -  most of it coming out of walking and carpooling. 

 

And surprisingly working at home did not grow enough to increase its share.  These rates of growth are shown below compared to total workers. Effectively, those modes of travel that grew faster than total workers gained share and those that grew less lost share.  In the 1980 to 1990 period the only modes that showed growth greater than worker growth were driving alone and working at home. In these data it appears that in addition bicycling actually grew the fastest, although from  a very small base.  

 

The growth in activity for all modes in the nineties appear in the table below:

 

 

NET CHG

 

1990-2000

(000's)

% chg

TOTAL WORKERS

12367

10.7%

DRIVE ALONE

13032

15.5%

CARPOOL

-1071

-7.0%

TRANSIT

492

8.4%

TAXI

15

8.3%

MOTORCYCLE

-79

-33.3%

BICYCLE

96

20.7%

OTHER

290

35.9%

WALKED ONLY

-1076

-24.0%

WORK AT HOME

669

19.6%

 

 

The extraordinary fact continues to be that in the nineties, as in the eighties, the increase in the number of single occupant vehicle users was greater than the increase in total workers. In effect all new commuters went to the SOV and additional commuters switched from carpooling, walking etc. The significant difference is that transit did actually gain in numbers of commuters in the nineties, though at a rate less than the growth rate for workers overall thus reducing its overall share, but a positive trend nonetheless.

 

Some may see cause for disappointment in that transit shares have not increased.  There are reasons to be somewhat more sanguine.  Transit served about 4% of the new commuters, less than its traditional overall share of 5%, but its gain of about a half million users certainly is a far superior performance than its actual decline of several hundred thousand in the 1980-1990 period.  If we can say that the decline of transit has been arrested we will have accomplished a great deal.  When the final census data are available it could show gains for transit sufficient to hold share at 5%. Transit reports show gains since the census was conducted. The more important share questions for transit are in metropolitan areas rather than national figures.

 

Congestion and travel times

 

The new census data are preliminary and indicate that average travel times to work increased to about 24.3 minutes, up from 22.4 minutes in 1990 and 21.7 minutes in 1980.  When adjusted to correct for definitional changes and given the extraordinary increases in travel activity adding approximately 30 million new commuters and 35 million new vehicles out there a travel time increase of around 2 minutes in 20 years is a really positive point, however the increase of about 1 and a half minutes from 90 to 2000 was more than double the increase in the previous decade.  Often in these hearings you only hear problems – in this case there can be some real pride in a system that has absorbed tremendous travel loads and by and large functioned very well.

 

Travel time is not about averages however. Some states have seen dramatic increases in travel times – especially those with already high densities or absorbing great growth such as Georgia 4 minutes, New York, New Jersey and Massachusetts all around 3+ minutes.  But a new phenomenon arose with more rural states showing very high increases as workers commute to large metro areas beyond the state borders.  West Virginia led all states with a 4.5 minute increase, Vermont grew 3.1 minutes and New Hampshire also saw large gains at 2.5 minutes.  About 9 million commuters nation-wide are now commuting more than 60 minutes.

 

More detailed data will be arriving from the census and the US DOT later this year that will expand our knowledge appreciably. One of the trends that is clear from other data sources is that commuting is now a relatively small and declining share of total passenger travel – roughly 20-25% of local travel.  We must remember not to focus on commuting to the exclusion of other important trips. 

 

       While commuting has grown rapidly in the last 20 years, trips for personal business, shopping, etc. have grown even faster. 

       Total trip-making per household has grown 66% since 1970 despite a 17% decline in household size. 

       Today the average person makes more than 4 one-way trips per day as the figure below indicates. 

       Moreover the average person makes about 4 trips greater than 100 miles from home each year with a round trip distance per trip of over 800 miles.

 

 


 

 


CHALLENGES AND GREAT OPPORTUNITIES LIE AHEAD

 

In the past I have called transportation “the collision of demography and geography.”  The following examines each in turn. 

 

THE CHALLENGE OF GEOGRAPHY

 

Few nations have been challenged by what Australians have labeled “the tyranny of distance” as greatly as America, and fewer still have reduced its influence on their economic future as we have.  We have succeeded through a combination of timely investments in infrastructure and benign public policies that served to permit market forces to work in very positive ways.  We have been blessed with great potential endowments and have responded well to those endowments. In the eighteenth century transportation knitted together a nation; in the nineteenth century it welded together great internal mass markets; and the twentieth has seen us integrate our nation into the world economy helping to define and support that world economy.

 

Transportation is all about reducing the time and cost penalties of distance on economic and social interactions.  To the extent that nations succeed in that function they enable tremendous forces of economic opportunity, social cohesion and national unity.

 

What do geographic trends have in store for us in the coming period.

 

       We now have 50 metropolitan areas over a million in population accounting for about 60% of the US population.  This is where most of the congestion and air quality issues will occur. 

       The remainder of the population is roughly 20% in metropolitan areas below a million and 20% in non-metropolitan areas.

       The net flow today is from metro areas to rural areas. We will have close to 60 million people in rural areas interacting more and more with metropolitan areas every day. 

       Suburbanization continues to extend the scale and extent of suburbs

       Metropolitan areas are growing together – the fastest growing travel pattern geographically will be inter-metropolitan flows – from the suburbs of one area to the suburbs of another.

       A key question will be the balance within suburbs of jobs and workers so that average trip lengths to job opportunities do not grow inordinately.

 

COMMUTING TRIPS IN MILLIONS

 

 

 

 


 

 

 


THE CHALLENGES OF THE NEW DEMOGRAPHY

 

All of our professional life times have been dominated by the baby boom. That and the dramatic increases in involvement of women in the labor force have defined our age.  As we approach 2010 many of the strong forces of the past will be less potent as the list below delineates:

 

       LOWER POPULATION GROWTH

       LOWER HOUSEHOLD GROWTH

       LOWER LABOR FORCE GROWTH

       SATURATION OF DRIVER’S LICENSES

       SATURATION OF CAR OWNERSHIP

 

       LOWER DOMESTIC MIGRATION RATES

 

 

 

Again, we have absorbed the massive impacts of prodigious growth in these areas over the last forty years and done it rather well. These elements, which have been the drivers of travel demand since World War II, will not be pursued here other than to say that they will not be as dominant an influence on travel growth and character as they have in the past, although their influence will still be substantial in specific areas of the nation, especially those still receiving dramatic levels of domestic and foreign migration growth. 

 

We will have new forces of change to address. One sign of the more balanced growth is that the 2000 census recorded growth in every state in the Union.

 

There are just a few demographic factors that will be the key forces of change in the coming period of reauthorization and beyond. These are:

 

       An aging population 

       A stagnating labor force

       Changing household composition

       A continuing immigrant wave

       Mainstreaming minorities – the Democratization of Mobility

       An increasingly affluent society

 

Of these one might say that the first three are inexorable – they will happen; and the last three are strong likelihoods but more open to question.

 

An Aging Population 

 

There are many facets to the challenges raised by our aging society. A sharp image is portrayed in the graphic below showing the crucial role played by the aging of the baby boom.  The combinations of that boom with greater health among the older population and declining birth rates will sharply shift the relationships between our population groups.

 

 

 

 

 


Present estimates place the population over 65 at about 35 million, only slightly increased from 1990. The small increase was a product of limited increase among the depression babies generation, those now between 65 and 75, but we also saw extraordinary growth in those between 75 and 85, rising 23%.  There are roughly 70 men for each 100 women in the group. Persons over 65 composed 12.4% of the population with 29 states with equal or higher percentages. 

 


By the end of the coming cycle of reauthorization those over 65 will rise to 13.2% by 2010 and reach 20% by 2030 as the last of the baby boomer surge reaches 65.  At that point we will have reached a stage where there will be more than 31 older citizens per 100 working age adults contrasted to about 20 today.  During this period the working age population is actually projected to decline by 5%.    At the same time the dependent young will remain about the same level.  As a result the number and kinds of trips made by and for the elder population will increase sharply. By 2025 there will be 27 states with 20 percent of their population over 65 or more, higher than Florida today.

 

A number of factors will have bearing on how that population will meet its travel needs:

 

  1. The coming older population grew to maturity in an auto-oriented world - 95% of those, men and women, who will be reaching 65 after 2010 now have licenses.
  2. Disability rates among older persons have been declining in the US, and the developed world, suggesting an active older population in the future.
  3. At present older citizens are retiring sooner and are more likely to have the means for an active retirement. 
  4. Retired citizens make almost as many trips of non-work purposes as the general population.
  5. Given that the trips most oriented to transit (work and school) are the trips not taken by elder populations it should not be a surprise that their travel is heavily auto oriented.

 


 

 

 


Stagnating Labor Force

 

  The chart above that showed the growth in the older population also showed the diminishing growth in worker-age groups. The graphic provides both the history and the future of American age and labor force relationships.  From the 70’s on we see the sharp rise of the working age population as baby boomers joined the labor force age group, compounded further by women joining the labor force in extraordinary numbers, doubling the labor force by 2010.  But as 2010 approaches, the size of the labor force age group stops growing and remains effectively constant out into the future. Some projections have indicated that the group actually slightly declines in numbers. The implications of this for retirement programs have been discussed extensively in the public press around the world. In fact the US is less extreme than many western nations in this regard.

 

The working age population responding to those job developments will be sharply changed from the past.  While the entire working age population is projected to grow by about 12% the number of members of the labor force over 55 years of age will grow by almost 47%. Workers over 55 will be responsible for half of the growth in labor force from 2000 to 2010.  Although these changes need to be of concern we should note that the average age of the labor force in 2010 will be about the same as in the sixties just as the baby-boomers began to join the labor force. 

 

From a transportation view, however, an additional and perhaps more significant factor will be shortages of workers, particularly in skilled jobs, which may lead to important potential changes in travel behavior, such as:

 

 

If the last decade was one of too many commuters the next may be the decade of too few.  There will be a severe lack of skilled workers in the future – apparent already.  We will have to employ everyone who is employable.  Transportation will be central to making that happen.  Connecting rural populations and inner city residents to suburban job centers will be one need. The great demand for workers means that workers will be more free to choose where they wish to live and employers will follow. This may mean greater dispersion of jobs and home sites, but it need not; workers may opt for center city living as well as rural life styles.  It will mean an amenity-driven development process where areas that can attract and retain workers will be highly advantaged.

 

Much of this suggests greater freedom for workers to define the when and where of their work.     It will mean more flexible work hours for older workers and parents.  Jobs in the future will be flexible in a more humanized work place – women in the work force have seen to that.  The jobs of the future will look to us from this vantage point like part-time jobs.  The implications for travel are a more dispersed and balanced travel pattern throughout the day.

 

Changing Household Composition

 

The number of households increased by almost 14 millions between 1990 and 2000, growing faster than population, yielding smaller average household sizes.  Households are key generators of travel – more so often than individuals.  Had households remained at their 1960 levels we would have 20 million fewer households today.  Households have declined to less than 2.6 persons in size, and family-based households are down to 3.14. 

 

Households without children have grown more rapidly than those with children. In 1970 40% of all households were those of married couples with children, today they account for less than 25% of households.  They are now outnumbered by married couples without children.

 

A notable facet of our future is that we have more than 33 million non-family households, about a third of all households, more than 27 million of which consist of persons living alone. We now have 10 million persons over 65 living alone, most of them women. Their transportation needs are likely to be significantly different than the general population.

 

The Continuing Immigrant Wave 

 

 

 

 

 

 


America is once again a nation of immigrants as it was at the start of the last century, as shown graphically below – however the extent to which that is true is unclear.  Census estimates have ranged from 8 to 11 million immigrants arriving in the 1990’s with some estimates reaching as high as 14 millions.  This would place immigration somewhere around 40% of the sources of population growth in the nineties and an even greater share of the labor force age group.  Of the roughly 28 million foreign born in the US today 40% arrived between 1990 and 2000.

 


From a transportation view it must be noted that additions to the population by natural increase generate a new worker in 18 or so years; whereas immigrants, heavily distributed in the working age years, are often instantaneous additions to the work force and the traveling population.  Of those immigrants arriving between 1990 and 2000 the census estimates that two-thirds are in the age group from 16 to 45, and more than 80% of men and 50% of women are presently in the labor force.

 

 The flow of immigrants nationally is toward the South and West; tending to locate where other Americans are, in the largest metro areas, where the jobs are.  Although they have been a significant factor in replacing residents who have been leaving center cities, the current immigrant wave is far more likely to arrive directly at suburban locations contrasted to center cities as in past migrations. 

 

Mainstreaming Minorities – the Democratization of Mobility

 

Many of the aspects of the questions regarding immigrant travel behavior are interrelated with a discussion of the travel behavior of racial and ethnic minorities.  For example, their arrivals in the many large metro areas of the south and west actually had the effect of reversing declining trends in the number of households without vehicles.  Not surprisingly there are indications that new immigrants use transit more than current residents, but that over time their travel choices echo the general population. Immigrants constitute a significant element of transit ridership today in many metropolitan areas.  A distinct role for the transit systems of the nation may well be in the socialization process of immigrant populations. 

 

It is often the case that immigrants and resident minorities constitute that group in our society with limited mobility.  Their growing access to vehicles will be one of the major factors in travel growth in the future.  The figure below shows the long term trend in vehicle ownership among households. The key observations here are that one vehicle households having been stable for almost 40 years at about 30 million households have jumped by 5 million in the last decade, and a related move of households without vehicles to below 10 million for the first time.  Both of these moves are strongly related to immigrant and minority trends.  We have moved from more than 25% of households without vehicles in 1960 to less than 10% today even with the surge in immigrants in the last decade.


 

 


The relative saturation in drivers’ licenses and vehicles has been noted earlier.  These apparent national patterns mask the reality that such saturation has a long way to go before it is a fact among minorities and immigrants.  While the White Non-Hispanic population tends to be saturated in ownership of drivers licenses, with both men and women having above 92% with licenses, these values are more like 80% among Hispanic and African American men and in the range of 70% among women of those groups. 

 

Auto ownership has similar patterns with households without vehicles at about 7% among White Non-Hispanics and closer to 30% for African-American households and half that for Hispanic households.  Even rural African-American households have 17% of households without vehicles. 

 

An important facet of national mobility regarding minorities is the longevity of the vehicle fleet and the resultant affordability of serviceable vehicles for lower income households.  The average age of the vehicle fleet today exceeds 8 years.

 

In many respects our minority populations are somewhere back in the sixties or seventies in terms of transportation and mobility

 

       They are at 25% of households without vehicles, as the general population was in 1960

       Minority women are at 70% with drivers licenses; white women probably were at that level in the 60’s.

       Long distance travel rates by minorities are less than the general population rates of the seventies.

 

 

Rising Affluence and Aspirations

 

Many of the aspirations we have for our society are closed connected with rising affluence, either in establishing the means for families to act on their own economic and social goals or to create the resources to assist those that do not have those resources.

 

Among these goals are:

 

       Home ownership and adequate housing – 2/3 of households today own homes

       Greater access to opportunity and social services

       Greater participation in the mainstream of society by minorities

       Increased freedom for all to act on their social and economic goals

 

All of these very desirable goals are tied to mobility and the interaction between mobility and rising incomes is strong.  Some key attributes:

 

       Minority households are reaching the income levels where vehicle ownership is an increasing probability and near certainty.

       There will continue to be a close linkage between workers and vehicle ownership. Most households without vehicles will also be without workers

       Trip making and trip lengths will increase with increasing incomes

       Long distance travel for business and recreation is strongly correlated with income.

 

Households spending going to transportation is about $7,400 per year, about 19% of all household spending, second only to housing  – not surprisingly most of it oriented to the acquisition and use of personal vehicles. Transportation, like other household expenditures, clothing, housing and food for example, is both a necessity and a discretionary good. The amount of spending rises substantially, even in percentage of income terms, with rising household incomes as documented in the figure below. 

 

 

 

 

 

note:  Those with low incomes may have other assets


 

Increased spending is closely associated with greater auto ownership, more trip making and with trips of greater length. In part this is attributable to the fact that higher income households often have more household members and more workers, but it is also attributable to the fact that higher income households have more discretionary income for travel including recreation, visiting friends and relatives, eating out, etc.   Auto trips over one hundred miles increase 4 fold between low income and high income households and air trips more than 7 fold.  In local travel trip-making by high-income households roughly doubles that of low income households.   Much of the growth in travel we have seen in recent years is a product of this affluence.

 

Long distance travel also means important international interactions, as not just we, but also our neighbors, rise in affluence.  Despite 9/11 it is expected that foreign visitors to the US will rise to 60 million per year by sometime after 2005, a delayed growth but with no long term effects – a tremendous force for economic health and social understanding – but a challenge for our transportation systems.  Foreign visitors, especially our North American neighbors, are heavy users of all aspects of our transportation systems.

 

 

Perhaps the most illuminating variation in transportation spending is that between rural populations and their urban counterparts.  Rural households have the highest share of income going to transportation expenditures (23.5%) contrasted to only 19% for urban residents. In fact they spend more in total dollars, about $7460 than their urban counterparts despite earnings about 80% of urban households. It is tremendously significant, however, that rural residents have the lowest housing costs share and have the lowest total costs share for the housing-transportation combination.  Housing and transportation are tightly linked in cost and character with transportation representing the trade-off in terms of home cost and size.  The fact that two-thirds of American households own their own homes is a crucial factor in our understanding of transportation budgets.

 

At 2000 with about 1.72 vehicles per household, on average, the majority of American households have two or more private vehicles; vehicles available equal or exceed workers in the majority of households regardless of the number of workers in the household.  Perhaps the most significant event in auto ownership, as noted earlier has been that households without vehicles have dropped below 10% of all households for the first time. 

 

One of the things that this says is that congestion is one of the prices we pay for a high degree of affluence and vehicle affordability.

 

In my view congestion is: People with the economic means to act on their social and economic interests - getting in the way of other people with the means to act on theirs!

 

Another thing the reality of rising national affluence produces is that the value of time will be increasing for most people.  As incomes rise the value of time rises accordingly. Particularly, the pressures of time will be acute for working women, seeking to balance multiple goals and tasks. 

 

We must also recognize that rising in parallel with that value of personal time is the rising value of the goods and products we move.  These too are a product of our increasingly affluent society.  It suggests that many products will be intensely time sensitive with a tolerance for high cost transportation if it provides high speed, reliable transport; this will often mean the air freight- truck combination.

 

Implications

 

In summary, America will be:

 

       A STABLE “OLDER” POPULATION 

 

       OPERATING IN A GLOBAL ECONOMY

       WHERE “HIGH COST” TRANSPORT IS OK

       WHERE SKILLED WORKERS ARE AT A PREMIUM

       WHERE MANY WORKERS CAN LIVE AND WORK ANYWHERE

       WHO, WHERE ARE THE IMMIGRANTS WILL BE A KEY QUESTION

       WHERE MAINSTREAMING MINORITIES WILL BE A KEY FACTOR OF GROWTH

 

We will be a challenge affluent society where transportation will have immense importance in helping us remain competitive and to realize our economic and social aspirations. 

 

To me transportation is about society building – not just economy building – society building !  It ties people together across distances – especially today when families are dispersed over the entire nation.

 

The greatest strength of our economy is the nationwide mobility of workers in a highly specialized division of labor.  Transportation knits families back together.

Many planners still think in terms of “community” as the people physically next door – our communities today are a product of multiple voluntary links across vast distances supported by two pillars –communications and transportation – virtual communities. 

 

Transportation’s goals are all about speed, cost and reliability and those are the three things we are just terrible at measuring in transportation! We must do better.

 

SUMMARY

 

In summary the factors that will matter most in the future are these:

 

For commuting – the lack of workers, skilled workers especially, creating a sellers market in jobs – greater freedom of location through technology and greater flexibility about work schedules (more part-time-like jobs) in the work place. Who and where the immigrants are will be central. Expect appeals to older workers and even more women to join the work force.

 

For Local travel – an aging population with more freedom and discretionary resources for recreation and other travel.  A more mobile minority and immigrant population. A generally more affluent society able to act on its social and economic interests.  Expect very active daytime, evening and weekend travel patterns.


For Long Distance Travel – many people in the peak long distance travel age groups; more people able to participate in long distance travel; more foreign visitors. Expect a peak period in American tourism.

 

For Geography – the flows between local elements of the nation will expand faster than the internal travel within those elements. Expect interaction conflicts between long distance and local travel.

 

A higher value of time for people and goods means greater emphasis on time-saving technologies and modes of transportation for both. Expect interaction conflicts between freight and passenger travel.

 

Transportation will always be about distance and time. I have said in the past that transportation’s goal must be to reduce the impact of distance on the ability of society to act on its social and economic interests.  Today in many respects America through its transportation system has largely overcome the challenges of distance and reduced its costs to our society. This is a large part of our success as a nation. We are now at the stage where it is the pressures of time that should be the great driver of transportation goals and issues for the future.