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Jerry Schippa

@jerryschippa

Traffic Engineer. Posts mostly about 🚦, 🚌, & 🎲.

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Latest posts by Jerry Schippa @jerryschippa

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Google Maps Find local businesses, view maps and get driving directions in Google Maps.

yes, before on the left. Many intersections along this path bend into the street like this. This signal is one of the last remnants of this design that needs to be updated. (the link is just east of the images above)

www.google.com/maps/@43.092...

11.03.2026 22:32 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The straight path offset from the street and a level crossing here has been a huge improvement!

11.03.2026 22:25 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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We are embracing bend outs over bend-ins.

Heres the before and after after a path realignment.

11.03.2026 22:23 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Are the left turns actuated?

I've defended our strategy of buses follow the left turns over the median bus lane because our TSP system can truncate those phases earlier if they are leading left turns than if they are lagging left turns and we have pedestrian overlap clearance times to consider.

11.03.2026 22:02 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
List of projects Congress has identified for FY 2027 funding. Source: https://www.congress.gov/119/crec/2026/01/22/172/15/CREC-2026-01-22-pt2-PgH1353-2.pdf

List of projects Congress has identified for FY 2027 funding. Source: https://www.congress.gov/119/crec/2026/01/22/172/15/CREC-2026-01-22-pt2-PgH1353-2.pdf

The Trump administration has yet to sign a contract for a single new transit project www.urban.org/urban-wire/r...

Even so, Congress designated 21 transit projects for funding in a recent spending bill.

I did a little more investigation to understand the status of some of these projects 🧡

11.03.2026 18:05 πŸ‘ 161 πŸ” 39 πŸ’¬ 4 πŸ“Œ 8
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Preparing for a discussion on why we struggle at certain high speed and volume intersections to meet warrant if the main reason is fear of safety from people walking.

Sorry, better get in a car if you want that signal!

11.03.2026 17:33 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Had my first test today at lunch with some coworkers. Ive got to figure out one tiebreaker situation and pay attention to scoring as I fear each hand may end up too similar as is. Rules around the emergency vehicle may help with this.

11.03.2026 17:17 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Late Entry Ped Comparison
Late Entry Ped Comparison YouTube video by Jerry Schippa

One push of a button at the controller can make a big difference for one push of a button by the user.

youtube.com/shorts/C37Re...

10.03.2026 20:48 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

If you went on a bike tour of your city where you got to talk about traffic signals...what would you want to see and discuss?

10.03.2026 00:23 πŸ‘ 4 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Awesome! Congratulations and welcome Sun Prairie!

09.03.2026 22:03 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Goal: have this game ready by NACTO.

First Step: quick prototype

07.03.2026 21:07 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1

Preach! Will the EMS department back this up with data?

06.03.2026 04:34 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

We've met human needs!

Humans need Transit Signal Priority!

06.03.2026 04:30 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thank you!

06.03.2026 04:29 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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We got a thing with our names on it for being good at Transit Signal Priority tonight. πŸŽ‰πŸšπŸš¦

06.03.2026 04:26 πŸ‘ 20 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0
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Forgot to post the games played last Tuesday at our public game night.

Mamma Mia (Uwe Rosenberg)
Agricola (Uwe Rosenberg, no pic)
Moon Colony Bloodbath (D. Vaccario)

And pitched my trick taking traffic signal themed game I hope to have ready for NACTO.

05.03.2026 16:39 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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a man with a mustache is making a funny face and says oof ALT: a man with a mustache is making a funny face and says oof

Imagine staying on until the end only to find the item you wanted to comment on is no longer a thing.

05.03.2026 04:12 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

*add lane condition (not add label)

05.03.2026 04:04 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Not an add label condition? Still not impossible, but you now need to start using ped overlaps and dummy phases with isolated ped button wiring and logic steps. But two way ped movements are possible!

Phew!

05.03.2026 04:04 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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In an add lane condition, you can pull out the slip lane and ped phases into ring 3 and run it independent of the rest of the signal. Want the peds on a hot button? Easy!

But you need two pieces of information on direction and potentially a large refuge island.

05.03.2026 04:02 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Slip lanes are unpopular...but they're also hard to make work well for pedestrians as considering 4 different movements can be nearly impossible.

Which has almost led me to believe the best slip lane for peds is in an add lane condition.

05.03.2026 04:01 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Pedestrian & Bicyclist Hybrid Beacon Instructions
Pedestrian & Bicyclist Hybrid Beacon Instructions YouTube video by City of Madison Wisconsin

We need to bring back more traffic signal informational videos!

Our one and only half signal/PHB was installed about 14 years ago.

youtu.be/xBj68uK7qCg

05.03.2026 03:44 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Strongest Town Contest 2026 Developing a safe, inviting, financially resilient town is hard work. It’s time to recognize the work being done. Nominate your town for the 2026 Strongest Town Contest.

Madison is a candidate for this year's Strong Towns award. I know how much you like voting Madison, you know what to do!

@strongtowns.org
@cityofmadison.bsky.social
@satyaformadison.bsky.social

www.strongesttown.com

02.03.2026 14:41 πŸ‘ 2 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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I get great joy loading my 12 8'boards into my sedan comfortably and watching truck owners not able to do the same in their trucks.

01.03.2026 17:09 πŸ‘ 51 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Ped button actuation logic
Ped button actuation logic YouTube video by Jerry Schippa

Traffic signal controllers are so much fun. This is a very simple logic statement that just says 'if that button is pushed when a certain phase is timing, call a different ped phase'.

This saves a lot of time for the person crossing, and is pretty easy to implement.

youtu.be/G9cjgl4reCI

01.03.2026 05:08 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

...that phase to activate the red truncation operation.

The BEST scenario for our setup is to have an optional leading transit phase in addition to the coordinated transit phase. EWA - First was great for this...but then had the issue of drivers jumping the gun and causing collisions.

01.03.2026 04:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I still say that it's beneficial to start with the left turning vehicles for how we sequence our signals. The left turn phase can gap out and is a variable timer for the adjacent ped interval.

If lagging, it cannot gap out and the ped phase ending is fixed meaning no opportunity for shortening....

01.03.2026 03:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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01.03.2026 03:50 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Maybe something like this is easier to read.

01.03.2026 03:41 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Idk, that sounds fun too.

01.03.2026 03:18 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0