Re: How Toll Plazas are desinged
- From: Steve <smalpert@xxxxxxxxxxx>
- Date: Mon, 30 Jan 2006 16:00:18 -0500
Larry Gross wrote:
Sigh. In NJ, EZ-Pass only lanes are striped purple. While it may not be standard, at least you can see (from that and PLENTY of "ONLY" signs) that you don't belong there. Obviously, with open-road tolling, the open booths are at the far left (rarely also at the right for a high-volume onramp), and there are plenty of mistakes when that happens because signs are NOT plentiful or clear enough.I note the following article:
Q.At the Downtown Expressway toll plaza during rush hour, the lanes are usually arranged in this order, left to right: two exact-change lanes, three Smart Tag only lanes, one exact-change lane and two full-service lanes. Why aren't the exact-change lanes grouped together?
Invariably, the one exact-change lane next to the full-service lanes backs up while the two exact-change lanes on the left are hardly used. It seems logical that the exact-change lanes should be together so drivers could easily select among them.
Also, faster traffic keeps left and slower slower traffic is to the right. So shouldn't the Smart Tag lanes be on the left?
A.There's a very good reason for having exact-change lanes on both sides.
It's for the drivers who realize at the last second that they are heading for a Smart Tag lane when they don't have a tag. Having exact-change lanes on both sides gives them the option of sharply cutting over to the right or wildly careening to the left."
http://www.timesdispatch.com/servlet/Satellite?pagename=RTD%2FMGArticle%2FRTD_BasicArticle&c=MGArticle&cid=1137833729569&path=%21news&s=1045855934842
comments: the rationale seems logical but what prevents folks who end up in the left toll lanes who still need to exit from still weaving across the lanes?
Folks who use the plaza regularily would "know" but what happens to folks who don't know?
Can toll plazas be designed (perhaps with jersey walls) to prevent those that enter the left lanes from cutting across after they exit the toll plaza?
How would all of this would with open-road tolling where folks with EZ-pass transponders would be maintaining a much higher speed than with plazas that force them to slow down as they enter the plaza?
-- Steve Alpert MIT - B.S. '05, M.S. (Transportation) '06 http://web.mit.edu/smalpert/www/roads .
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