Posted under Budget & Transportation
Maryland I-270, which runs from the Capital Beltway into Frederick County, is one of the most congested traffic corridors in the state. There is now a major push underway to spend about $4 billion to widen the road up to 12 lanes, which would be the most expensive transportation project in Maryland history.
To understand why this proposal would be counterproductive, just go back 10 years. From the January 4, 1999 Washington Post:
Congestion on Interstate 270 had grown so oppressive by the mid-1980s that Montgomery County transportation director Robert S. McGarry pressed the state to widen it six years ahead of schedule. Maryland responded with $200 million to widen more than a dozen miles, up to 12 lanes in some stretches.
But now, less than eight years after the project was finished, the highway has again been reduced to what one official called “a rolling parking lot.” Traffic on some segments already has exceeded the levels projected for 2010…
National transportation analysts say it’s no surprise: Widened highways generate their own traffic. This phenomenon, called “induced travel,” raises urgent questions for the Washington region at a time when area officials are planning to expand other highways and interchanges, such as the Capital Beltway, Interstate 66 and the Springfield interchange.
Although the exact magnitude of this effect is much debated, some studies suggest that induced travel might entirely overwhelm any relief from congestion resulting from new road capacity.
Motorists may decide to make more trips than before, convinced that the wider road will reduce congestion and make each trip quicker. They also may switch from other routes, expecting to save time. And they may abandon mass transit and climb into their cars – all of which put more vehicles on the widened highway.
Now, 10 years later and in the midst of severe budget shortfalls, we are ready to spend billions to make the same mistake again.
The proposal is more than an ineffective use of resources. It would have a seriously detrimental impact on Maryland’s environment, which is why it is opposed by a number of prominent environmental groups.
We need to break through old way of thinking about traffic congestion and look at how we can most effectively and efficiently use resources to ease traffic, including all forms of transit, ride sharing and telecommuting.
We’ll be following the issue closely on Legum’s New Line as the debate over I-270 continues.
[HT to Greater Greater Washington, which has the best and most comprehensive coverage of this topic.]
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