It is no big secret that traffic
congestion along the Wasatch Front has gotten worse in the last few years, even
with the re-construction of I-15 and new TRAX extensions. Most of us suspect that congestion will
continue to get worse over time even with such major projects as the Legacy
Parkway, Commuter Rail and several important arterial street widening projects. What is not generally known is how much
worse it will be and how quickly it will happen. As the transportation planning agency for the Wasatch Front
Region (Davis, Weber and Salt Lake Counties), the Wasatch Front Regional Council
(WFRC), in partnership with the Mountainland Association of Governments (MAG)
in Utah County, UDOT and UTA, is charged with developing and adopting the
Regional Transportation Plan which governs transportation development along the
Wasatch Front.
As part of the development of the
Regional Transportation Plan, the WFRC simulates future travel demand using a
sophisticated mathematical model based on predicted population and employment increases. It is apparent from the results this model
that, given the current levels of investment and the anticipated population and
travel demand increases, by the year 2015 the Wasatch Front will begin to hit a
tipping point at which traffic congestion will begin to be much worse.
A graphic depiction of what this
will mean to the average motorist at peak rush hour is shown below with red
representing traffic congestion in which the average highway speed is 30 miles
per hour or below the posted speed limit.
This means that not only will it
be inconvenient and time consuming just to get work, it will also be almost as
bad for other special events such as going to a ball game or a concert. This congestion will have particularly
negative implications for freight movement and the general economic health of
our community. The transportation
network has often been compared to the circulatory system of our bodies. When that network gets clogged, the body
may sicken and even die. In like
manner, a clogged transportation network inhibits the economic health of the
region and its ability to provide jobs and tax revenue to support basic
services such as schools and public safety.
Being concerned about the future,
we have proposed what amounts to a paradigm shift in the Utah transportation
planning world. It is apparent that in
certain corridors we cannot easily or cheaply widen the roads anymore and we
cannot get any more cars on the roads we already have. During peak periods of congestion, the
throughput of these roads diminishes dramatically. For example, a typical freeway lane can handle approximately 2200
vehicles per hour at maximum capacity.
When 2400 cars per hour attempt to use that lane, congestion quickly
reduces the average vehicle speed to a crawl and vehicle throughput falls
accordingly to a few hundred vehicles per hour. Accidents and other incidents have a similar, though not as
frequent effect.
Other, generally larger, cities
in the United States and around the world have long since discovered the fact
that in such congested corridors, public rail transit such as subways, and commuter
and light rail trains continue to move at the scheduled speed despite the
adjacent congestion. That is the
difference. This is not rocket science
and it is not new. Though the trains
may be packed solid, because they are dispatched in an orderly fashion, they continue
to move. Thus, even though they are
very expensive, most large cities have invested in fixed guideway public
transit systems that are not subject to congestion.
This has been a difficult
transition for the transportation community in Utah which has historically used
a relatively simple mantra that if traffic congestion exists, we simply build
more highway capacity to solve the problem.
As a result of our dramatic growth, however, we are beginning to reach
that tipping point where the old rules no longer apply. We cannot, for example, realistically widen
I-15 in Salt Lake County any more than we already have.
We are not saying that we should
not add highway capacity where we can, such as the Legacy Parkway in Davis
County for example, because we should.
We will always be a car dependant community and it is unlikely that we
will ever approach the densities and transportation requirements of New York or
Chicago. Nevertheless, our population
densities are increasing rapidly and we are becoming much more urban than past
years which necessitates a shift in the response to the challenge of increasing
traffic congestion.
Consequently, the WFRC has
recommended a transportation infrastructure improvement plan that would commit
substantial spending to highways
and public
transit, primarily in the form of TRAX and commuter rail. Even though public transit presently
accounts for only 3% of all trips made in a vehicle, we believe the percent of
work trips made on public transit will become much higher in future years as
commuters discover, as they have in other cities, that they can
reliably predict the time it will take
them to get to work on these fixed guideway systems as opposed to the
uncertainties of traffic congestion.
At the same time, channeling large
numbers of commuters onto public transit reduces the peak loads on the highways
and allows them to function more reliably as well for those individuals who
cannot use public transit and for freight movement. Hopefully, the vote in November to fund an aggressive extension
of our public transit system will make this new vision a reality.
Lastly, the funds we commit for
highways will implement additional productivity improvements because congestion
management and not simply new capacity will be the goal including strategies
such as signal timing, ramp metering, HOV lanes, etc.
To facilitate this philosophical
shift, WFRC and MAG partnered with Envision Utah in a lengthy and extensive
visioning program that explored dozens of options for meeting our future
transportation and growth needs.
Through the use of extensive public participation involving thousands of
citizens and community leaders at thirteen workshops and four open houses
across the Wasatch Front, a vision for future growth was agreed upon and a
series of growth principles adopted to guide future infrastructure investment. Among those principles are goals such as
emphasizing transit oriented developments, multiple town centers and placing
employment centers closer to where people live, coordinating the placement of
large traffic generators such as colleges and hospitals with transit
development, etc. The WFRC has actively
promoted these principles with our member cities and counties with a generally
favorable response.
With this change in transportation
philosophy and practice, we hope to make your transportation future a livable
one. Without such a change, we believe
we are less than ten years away from a traffic situation similar to that in Denver
where most people respond to the question, how far is such and such place with
an answer in time rather than in miles.