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| Re: ''World Class Bus Rapid Transit'' for Woodhaven Blvd... lol (299701) | |||
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Re: ''World Class Bus Rapid Transit'' for Woodhaven Blvd... lol |
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Posted by RIPTA42HopeTunnel on Mon Nov 10 05:41:55 2014, in response to Re: ''World Class Bus Rapid Transit'' for Woodhaven Blvd... lol, posted by BrooklynBus on Sat Nov 8 23:09:59 2014. Just because you are a traffic engineer, I am supposed to believe you that traffic on Cooper woud not be backed up to Woodhaven with only one lane for through traffic and for left turns? The green on Cooper is no longer than 60 seconds. If one car has to make a left turn, he will hold up all traffic until the opposing traffic passes.No; because I'm a traffic engineer you're supposed to believe that I wouldn't consider reassigning traffic to Cooper without also considering changes in signal timing and lane assignments at Cooper and Metropolitan. I can almost guarantee that the green on Cooper is currently less than 60 seconds. What if two cars must make a left? How many cars will be able to get through that light? I don't know; what's the opposing through traffic? But wait! Just today I was on Woodhaven on Saturday morning. Hardly the peak. I counted 11southbound cars waiting to make a left onto Metropolitan. How many 55 foot tractor trailers? How many cycles would it take for 11 cars to make that left? Depends on the phasing, timing, and opposing traffic volume. And while they are waiting to make that left, with only one lane no cars would be able to proceed west on Cooper or Metropolitan. Then it doesn't have to be one lane. If trucks are rare, stripe it as two lanes with the lane being either shared or exclusively for left turns, and let the odd truck make a wide turn. If there are a handful of trucks, then stripe an exclusive left turn lane and a shared left turn/through/right turn lane to formalize trucks turning left from the right lane. If there are a lot of trucks, it probably isn't practical without changes to the local truck network. |
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