Your request has been reviewed and assigned to the PWD, Engineering Department.

Good luck! The humans behind this app at thee city do not exist anymore to help. its all AI dead end communication.

Maybe should be directed to traffic safety instead of traffic calming?

I live on 37th and we have talked to the city about speeding on 37th for years. I appreciate you taking the time to post your concern😊

We'll look to see what speeding data we have on these roadway segments. If we don't have any recent data, we'll setup up tube counters to better understand vehicle speeds here. It looks like we could at least add a speed limit placard for NB traffic on 37th Ave near S 192nd St. S 192nd St appears to have sufficient speed limit signage already.

In order to get speed humps installed, there's a detailed engineering process that needs to occur first. Even if traffic data supports installation of speed humps and they're feasible from an engineering standpoint, a petition is required from all residents directly impacted by these improvements requiring a 60% approval threshold.

Reality is that not everyone wants speed humps on their street for one reason or the other. For example, having a speed hump in front of your home increases vehicle noise, reduces emergency response times, and makes snow plowing difficult. This is why the petition process is necessary and installation of speed humps is not a trivial improvement.

We'll keep you posted on the data collection front and see where that takes us.

Thank you for responding to our concerns.
Thru the years they have done the tube counters. The problem has been where they were put. On 192nd it was put where people have to slow down to turn onto 37th so the speed is not accurate for what they are really doing. On 37th the counter was put too close to 192nd where they have to slow down to stop at the stop sign on 192nd. I live on 37th and A few years ago I was turning into my driveway (coming from 188th) and the person was going so fast they couldn’t stop. They tried to pass me on the left side (the direction I was turning) They hit my car went into my yard, took out the fire hydrant and my neighbors mailbox.
I would think that more than 60% of the home owners in 37th would love to have speed bumps installed.

We'll place tube counters on 192nd between 34th Pl S and 35th Ave S. This is the rough midpoint between the stop at 33rd Ave S and 37th Ave S. The counters on 37th Ave S will be positioned midway between S 188th St and S 192nd St. This is the best we can do from a location selection standpoint for data.

Thank you for looking into this, City of SeaTac!!

Also, I appreciate the explanation about the speed humps - that's understandable about the neighbor buy-in.

The City collected traffic data using pneumatic tube counts from Tuesday, February 27th, 2024 to Monday, March 26, 2024. If you would like a copy of the data, please contact me at pkang@seatacwa.gov.

To be fair and consistent with how we approach roadways such as yours the City must rely on procedures and data to make decisions on these matters. The Neighborhood Traffic Safety Program (NTSP) is our current policy on speeding issues. Per the NTSP, traffic data must show that at least 15% of the overall traffic volume on the roadway exceeds the posted speed limit by at least 10 mph to implement traffic calming measures.

As of today, these roadways do not meet the speed criteria. Along South 192nd Street, 3.9% of vehicles exceed the speed limit by 10 mph or more. Along 37th Avenue South, 2.8% of vehicles exceed the speed limit by 10 mph or more.

Since you had originally requested speed humps, I want to briefly explain how the City makes the determination on whether Phase II traffic calming measures, such as speed humps, are appropriate for any subject roadway. If the speeding criteria referenced above had been met, the City would have first implemented less restrictive, Phase I traffic calming measures including pavement markings, flashing speed signs, and police speed traps. Once these improvements were in place, a second 7-day pneumatic tube count would have been performed to evaluate their effectiveness. If the second round of traffic data suggested that there were still speeding issues, we would have proceeded down the road of looking at Phase II traffic calming measures which involve more physically restrictive roadway improvements such as speed humps. Each of the following criteria must be met to move forward with a Phase II traffic calming study:

1. Average daily traffic (ADT) must meet or exceed 200 vehicles per day.

2. Traffic data must show that at least 15% of the overall traffic volume on the roadway exceeds the posted speed limit by 10 mph or more.

3. The subject roadway must not be classified as an ‘arterial’.

4. The existing roadway grade must not be steeper than 10%.

5. 60% of residents directly impacted by the proposed traffic calming improvements would need to approve moving forward with the proposed work.

I'm the original requester - thanks for studying the issue and explaining the process. Speed humps were a suggestion for the speeding issue - if there are any other less restrictive traffic calming measures that could be realistically taken, I'd be happy to request those!

They also do not stop at the stop signs. I have been almost hit n 192nd from people running the stop sign on 37th and the 4 way on 33rd.