Late merge helps ease stack effect at on-ramp
By ROAD WARRIOR, The Virginian-Pilot
© December 8, 2004
Last updated: 9:10 PM
Hey, Road: In AutoWeek magazine, I saw an item on a merging pattern used in Pennsylvania, which I think would work well on the Va. 164 approach to the West Norfolk Bridge, where there are severe merging problems.
In Pennsylvania, a sign is posted a quarter-mile before the lane ends, stating: ?Use both lanes until merge point.? A second sign is posted by the merge point, reading: ?Merge now, take your turn.?
Edward F. Unser, Suffolk
Dear Edward: Road has referenced Pennsylvania?s ?dynamic late merge? system before, and I like it. Some points:
There are two schools of thought on merging. No. 1 is, merge early, it?s rude to drive to the end of the cue, then expect people who have been waiting patiently to let you in. No. 2, merge late, holds that it?s not a matter of sweetness ? it?s about efficiency. By merging late, you utilize the maximum amount of room for cars to ?stack.?
Any system is better than no system.
The Virginia Department of Transportation has no system.
Every evening, Road takes the Interstate 264 West on-ramp from City Hall Avenue. I wait to merge for the Downtown Tunnel until just before the I-264/ I-464 split.
But many motorists merge into the left two westbound lanes as soon as they come off the on-ramp. This has a huge trickle-down effect, felt every afternoon throughout downtown Norfolk.
The City Hall Avenue on-ramp backs up, all the way to the City Hall/St. Paul?s Boulevard intersection. Interstate-bound motorists either get stuck in the intersection, creating gridlock, or at a red light on St. Paul?s.
Simply: If everyone merged as late as possible, there would be more room on the Berkley Bridge/I-264 West for cars.
Road?s modest suggestion to VDOT: Pick a pilot site for Pennsylvania?s ?merge late? program and give it a try. The Berkley Bridge /I-264 West and I-164/West Norfolk Bridge seem like good candidates.