jerryschippa.bsky.social
Traffic Engineer. Posts mostly about 🚦, 🚌, & 🎲.
905 posts
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Nice. Rush hour in Madison last night.
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Congratulations and welcome!
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Pinckney Street
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King Street
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Nice! From what I've heard post network change Madison should be a bit better now than 24 data. But we'll see.
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Actually makes me wonder if any of those cities that provide less service but see higher ridership went through any system changes to explain the efficiency gains?
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Not even close on style.
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When you spend $45 million of other people's money on your dictator chic birthday and it's still worse than a roadside Taco Bell value-package party.
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I want to see a Madison v Milwaukee friendly rivalry competition...who has the better BRT, beaches, zoning, nightlife, etc.
That would be fun.
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I want to hear APS buttons in New Jersey and a midsoze city in the south now.
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The ones purchased with the BRT project is from someone in Milwaukee (or whatever suburb TAPCO is based out of).
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Next job is...why do the APS buttons at S High Point and Mineral Point Road yell "Wet!" at you instead of Wait.
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I think you can allow them on roads by municipality though. Theres something in the works in our township to allow them, which is fine by me. We have no sidewalks or paths so IDK where the law expects them to go.
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I forgot I took a video of the late Entry ped in action Here's a better video.
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The only downside is you lose out on some safety operations like leading pedestrian intervals and omitting flashing yellow arrows. So there should be consideration for the risks involved.
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This video doesn't show it, but it is! With some somewhat unconventional detection setting, you can make it so as long as the signal is green the full ped phase is available.
Im using it more and more at our uncoordinated signals.
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Have this piece of technology that works just fine on its own...but we "added AI" which needs a room of technicians to monitor, so now you also need to pay an SMA.
The cynic in me thinks a lot of AI is just rent seeking.
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10% seems low
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In practice, you get pressure to add signals from politicians, pressure to not add signals from the state, and very little discussion on access management otherwise.
Going through this now where were trying to concentrate left turns to fewer unsignalized locations to avoid new signals.
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The scope and purpose of the MUTCD seems to be creeping into design and operations.
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I also want to figure out how to make removing signals easier. Tried that twice...I've never seen so much angry public feedback.
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I've both pushed back against the MUTCD for not allowing more signals, as well as recommended against signals at intersections that met warrant when upstream signal timing could be adjusted.
Its a fine guidance, but engineering judgement should take precedence.
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Funny you say that, I've seen it far more often assumed that by adding more lanes to the side street, warrants WOULDNT be met and therefore a signal isnt needed.
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Part 4, the signal warrants, sorry I dont have the sections memorized. Most warrants view the intersection in isolation, the only one that doesn't is about vehicle platooning.
Of course you should use engineering judgement, but often the warrants are viewed as gospel, not guidance.
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In this case, its going to be more efficient to slip in extra phases rather than have one phase and rely on traditional TSP to end the other phases sooner.
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To me Transit Signal Priority is more of a concept, not a specifix thing. But generally when people say TSP they mean holding the green or shortening other phases to get to the busses green sooner.
Sometimes one method is better than the other, just depends on the situation.
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We just got a request for one at an intersection 350 feet away from another signal. My first thought is no, and actually let's actually think about the coridoor not just this one intersection.
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The MUTCD seems to be setup to analyze intersections in isolation (of course unless vehicle progression is of concern). I wonder how much of this is a result of that vs planning out traffic flows/patterns along coridoors or neighborhoods?
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Here's another video showing the operations.
Note: the issue of the bus arriving a few seconds too late was corrected. Lock phase next on the phases following a transit phase were turned off.
youtube.com/shorts/dxHlO...