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92% of drivers speeding on Aurora points to need for urgent action

Aurora Ave N near the location where 92% of drivers were recorded going over the speed limit

A speed study conducted by the Seattle Department of Transportation early last October showed that 92% of drivers using Aurora Ave N at N 112th Street, where the speed limit is 35 mph, were exceeding that speed limit, with 66% of drivers going 5 mph or more over the limit and more than one in four drivers exceeding the speed limit by 10 mph or more.

Another speed study conducted last August further south at N 68th Street, just south of a zone with a 30 mph speed limit, showed slightly lower speeds despite a speed limit of 40 mph at that spot. There 19% of drivers were clocked at going over 45 mph with 26% of drivers recorded at that speed up at 112th.

Most of Aurora Ave N has a speed limit of 40 mph, with segments signed for 30 and 35 mph in the most dense commercial areas along the state highway. In late 2019, Mayor Durkan announced that nearly every single arterial in the city would have its speed limit lowered to 25 mph, but a state highway like Aurora Ave requires the city to coordinate any speed limit changes with the state and so far we haven’t heard any indication it will be moving to lower speed limits here.


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As the speed studies show, simply lowering the speed limit will likely not do much to influence driver speed; more comprehensive design changes will be required. But the problem is urgent: in the past two-years, ten people have died on Aurora Avenue in Seattle, most of them people walking along the street. Statistically, a pedestrian struck by a vehicle traveling 40 mph has a one in ten chance of surviving the crash.

SDOT Director Sam Zimbabwe responded early this morning after several North Seattle state legislators in recent weeks indicated support for changes to improve safety on Aurora but pointed toward a need for SDOT to take the lead on those changes. He was responding to Lee Bruch, an outspoken advocate for a safer Aurora Ave. His response:

“It is great to hear about the State-level support for continued investment in Aurora. We continue to work on small-scale changes to address the most challenging locations, but there is a limit to what results those can bear. Some planning and project definition work is really the next step for us on those larger investments, which is reflected in that grant you cite below. We face major investment needs in safety and infrastructure across the city and will need partnerships at all levels to bring those to fruition with the urgency needed. The planning work will better define what comes next while we continue to work on smaller steps to improve safety for all users.”

The City has applied for a state grant that would fund most of a $2 million study to determine changes to the street. It is frustrating to have to wait for a new study to be able to implement design changes to lower speeds on a street that has had the same problems for decades, but if that’s what’s necessary to ensure that the changes are comprehensive, so be it. Aurora Ave was just repaved for its entire length, which would have been a perfect chance to implement changes, but not even sidewalks could be added where they are currently missing.

Bruch told me today he was positive about Director Zimbabwe’s response: “I agree with him on the necessity to do long range planning”, but told me there were a lot of spot improvements that could be made along the corridor. One of those is a possible expanded sidewalk protected bike a jersey barrier near Green Lake where a UW student was struck by a car in 2019. He also pointed toward the closure of the slip lane off Aurora onto West Green Lake Drive as an example of where obvious improvements could be made.

Slip lane at West Green Lake Drive and Aurora Ave N

Ultimately, Aurora Avenue needs to be redesigned for lower speeds along its entire length. While it’s true the city faces a lot of need for safety improvements as Director Zimbabwe indicates, Aurora Ave sees a huge proportion of the injuries and fatalities on Seattle’s streets, and to date it doesn’t seem like the City is treating it that way.


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12 responses to “92% of drivers speeding on Aurora points to need for urgent action”

  1. btwn

    Great article. Have a link to the study?

    1. Ryan Packer

      Added a link at the top.

  2. asdf2

    Part of the problem is that Aurora is too wide and too straight. It has fewer curves than even I-5. Other than traffic and stoplights, there is nothing physically stopping a car from driving down Aurora at 200mph. A small plane could probably take off and land using the street as a runway.

    1. Ballard Biker

      You could say that for a lot of streets. Here in Ballard: Leary, Market (if not for the catenary wires) and 15th have stretches that could land a business jet. 20th and 24th could land a Cessna in a pinch.

  3. Andy B

    Weirdly, Aurora/99 north of Woodland Park Zoo is actually not all that bad for riding on because of the bus lanes.

  4. Pickle

    Bury the freakin’ thing!

  5. Lee

    One thing that reduces speed on major arterials is frequent traffic signals.

    That also has the benefit of creating more and safer crossig points for people walking or on bikes.

    More frequent signals would be better is the business areas north of Woodland Park. But south of Woodland Park, between it and the bridge, at-grade crossings and signals would help and they knit the neighborhooods together that are currently split by Aurora’s barrier.

    In Vancouver BC two major approaches to downsown from the south, Cambie Street and Oak Street, both have many more signals more frequently spaced. And surprisingly, from Vancouver volume counts, at equivalent locations they have higher traffic volumes than Aurora. Slower? yep. Safer? yep.Does it take a bit longer for a driver to get through? Yup, But that raises the question of where values lie: safety and an urban envieonment, or saving a few mintues driving along the Aurora Speedway.

  6. Seaguy

    Well we can forget traffic enforcement. With the defund activists convincing our out of touch council that we need fewer police traffic enforcement is low on the priority list.

    1. Ballard Biker

      There’s basically zero traffic enforcement right now. It literally can’t get any lower on the priority list.

      I would rather the City enforce traffic laws, as terrible drivers affect and threaten my life on a daily basis.

      If there’s concerns about racial bias within SPD, parking enforcement recently got moved under the SDOT umbrella; there’s no reason unarmed traffic enforcement officers can’t be implemented under SDOT as well.

    2. NoSpin

      Enforcement is fine if we can change the laws to allow for more traffic cameras; there’s no need for armed law enforcement officers to be handing out traffic tickets.

  7. William C Bonner

    I know it’s not popular on a bike blog, but reducing the speed on the arterial streets makes it more likely traffic will just use the side streets.

    1. Lee

      Already too much traffic cuts through residential streets.
      That can easiliy be prevented by making it difficult to cut-through on those residential streets by using diverters, opposing one-way blocks, frequent stop signs, or many other techniques that discourages cut-through traffic.

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