Portland is a PR machine for light rail & streetcar
Here are Some Facts About Portland Oregon
Trimet Study: Higher density = More cars on the road (more congestion)
Oregonian, September 25, 2007:
If the Eastside Streetcar is built, about 4,537 housing units would be added along
the route, compared with 1,105 without it,
Residents in such dense neighborhoods travel an average of 9.8 miles a day by car,
less than half the 21.8 miles a day for Portland-area suburbanites. By driving less,
they reduce roadway congestion, pollution and greenhouse gas emissions.
Lets Look Closer:
Low density......1,105 units x 21.8 miles/day = 24,089 total miles/day.
High Density....4,537 units x 9.8 miles/day = 44,462 total miles/day, about double
the total driving on the same streets.
It appears that density does reduce driving, but not enough to compensate for the
increased number of people the result is increased congestion since there is more
travel on the same streets..
Also see High Density Causes Congestion(based on Dunphy and Fisher: "Transportation,
Congestion, and Density: New Insights," Transportation Research Record, No. 1552)