While I doubt anyone ever proceeds through the transition from 139W to 1/9N at a speed high enough to cause injury, the costs of all the fender benders probably add up and any reduction in accidents should be factored into the economic benefits.

Not to mention that the interchange (if you can call it that) as presently configured is an affront to human dignity and a profound embarrassment to the people of New Jersey.

Not necessarily.

"The typical project to improve traffic flow removes only seconds or, at best, minutes from a daily commuting trip.8 A recently released study indicates that once improvements to the Springfield I-395/I-95/I-495 interchange ("mixing bowl") are completed, commuters can expect to save only 30 seconds per commute.9 Drivers will spend more time in construction delays associated with the interchange project that they will likely ever make up from the increased road capacity.10 "

Citations are available here: http://www.acstnet.org/topten.htm

if the traffic flows better at that intersection after they are done, it will be so worth any construction inconvenience we have to suffer..

They are re-routing the interchanges at Tonnelle Circle, Truck 1&9, Route 7 and the exit ramp for the Pulaski Skyway, as well as Fish House Road. Its actually two projects technically, but it looks like they are doing them both at once.

http://www.state.nj.us/transportation ... /rt7wittpenn/projmgr.shtm

http://www.state.nj.us/transportation/commuter/roads/rt1_9t/

Bridge replacement over the train tracks and a new onramp/traffic pattern for the Wittpenn lift bridge replacement project.

Does anyone know what they are building near the Tonnelle circle /U-Haul and the constructions goes down Rt 7. Are they building light rail extension or widening the highway? Anyone know?