Portland is a PR machine for light rail & streetcar
Here are Some Facts About Portland Oregon
“It must always be remembered how cost-effectiveness works in the public sector:
the cost IS the benefit.” - author unknown
You Can Build Your Way Out Of Congestion
A well balanced article on building your way out of congestion from the FHWA
In metropolitan areas, highway facilities are usually built or widened where existing
traffic congestion has already decreased travel speeds during certain times of the
day. To avoid the congestion, some travelers may have diverted to alternative routes,
changed the time they make their trips, switched to different travel modes, traveled
to other destinations, or decided not to make a particular trip at all. The new or
widened highway facility can carry significantly more traffic before it becomes congested.
Many travelers who previously took other routes or traveled at other times may switch
to the new facility to take advantage of decreased travel times. The increase in
traffic on the new facility resulting from these changes is largely offset by reductions
in traffic along parallel routes and at other times of the day. The net effect on
region-wide daily vehicle miles of travel (VMT) resulting from these travel behavior
changes is minimal. The articleNewer LinkArchived Copy
Netherlands Institute for Transport Policy Analysis
KiM defines ‘latent demand’ as the increase in car use per day on the entire motorway
network (in number of vehicle kilometers travelled), which exists as a consequence
of the expansion of that network. The extent of the extra car use that is manifest
in capacity expansions differs strongly per expansion. On average, five years after
the road network’s capacity is expanded by 10%, one can expect an effect of 3 to
5% extra car use on the network. English summary Full document in Dutch: Document
A Statistical Analysis of Induced Travel Effects in the U.S. Mid-Atlantic Region
“After accounting for other important determinants of travel and for potential simultaneity
bias, the estimated elasticity between VMT and lane-miles is estimated at 0.2 to
0.6. This implies that a 10% increase in lane-mileage can result in anywhere from
a 2 to 6% increase in total VMT. A Granger test further indicates that changes in
lane-miles precede changes in travel.”
Of course any increase in VMT means that the new road is serving people who need
to travel. Unless you believe that people will suddenly drive to work twice each
day if there is less congestion.
San Jose road construction cuts rush hour delay in half.
San Jose is living proof that crowded cities can build their way out of congestion:
Between 1989 and 1994, the region gained 100,000 new jobs, yet new road construction
cut the delays encountered by the average rush-hour driver in half. ...
In 1984, voters in Santa Clara County (of which San Jose is the seat) approved a
ten-year half-cent sales tax for new highways. This allowed the construction of several
new freeways and the expansion of several more. As a result, the Texas Transportation
Institute estimates that the delay facing each rush-hour commuter declined from 100
hours per year in 1989 to just 50 hours in 1994. From page 2 of ADCsummer07
Utah Reduces Congestion With Increased Road Capacity
From UDOT web site: Since the Parkway opened to traffic it is estimated that traffic
on I-15, between the U.S. 89/Legacy Parkway/I-15 interchange in Farmington and the
I-215 exit in North Salt Lake, has been consistently reduced as much as 20 percent.
Additionally, the Parkway provides a unique "escape route" from the Salt Lake City
area northward, when accidents, construction, or other events significantly slows,
or even closes I-15. Full article from Utah Department of TransportationLocal
What a relief extra lanes on the N.J. Turnpike are
What a difference a few extra lanes make.
The 35-mile stretch of the New Jersey Turnpike from Mansfield in Burlington County
to East Brunswick in Middlesex County was dreaded by motorists, who were regularly
held up in annoying traffic jams.
But now - a few weeks after the completion of a $2.3 billion widening project - many
are singing the turnpike's praises, even as the major artery faces its first big
test: the Thanksgiving weekend, with the year's heaviest volume.
The usual stop-and-crawl delays of a half-hour to nearly an hour - especially on
the Wednesdays before the holiday - should be history, officials said. No more backups
of 11 miles northbound and nine miles southbound - the standard for travel on the
day before Thanksgiving.Full article from Philly.comLocal PDF