Tag Archives: Vision Zero

ANC 6B Requests New All-Way Stops

On Wednesday, December 5, the ANC 6B Transportation Committee unanimously approved a motion to convert four intersections from two-way stops to all-way stops. Tuesday, the full ANC passed this resolution by consent (letter to DDOT at end of PDF here)

The impetus for this request was a meeting between the Executive and Council on October 23 following a tragic and deadly summer of deaths on District roadways. At this meeting, the District Department of Transportation presented new projects and initiatives to increase efforts to reach the Mayor’s target of zero road deaths by 2024. The packages were expansive and many items would require legislation or regulatory rule changes to implement. The following links have more information.

One of the engineering initiatives, four-way stops at “local/local” intersections, can be implemented without study or delay. This request from ANC 6B asks to convert all four-way local/local intersections with two-way stops in ANC 6B to all-way stops.

(Local roads are a technical term, using functional classification of roads by DDOT and the Federal Highway Administration. Local roads receive no federal money for upkeep or control. Because of this, DDOT can make changes to these intersections without clearance form FHWA. Click here to see an map of functional classifications; if a road is not colored in it’s a “local” road)

The intersections are, from west to east:

5th St SE & D St SE

10th St SE & South Carolina Ave SE

12th St SE & G St SE

14th St SE & South Carolina Ave SE

The ANC evaluated only the four-way local/local intersections that aren’t two way stops. The ANC will continue to push for all-way stops at non-local two-way stops and push for engineering solutions to challenging and complex non-local roads. Where necessary, we will also push for study of local and non-local three-way stops, but the case for all-way stop is less readily apparent for those intersections. 

Comments for Vision Zero Roundtable 9/27

On Wednesday, September 27 Council Members Mary Cheh and Charles Allen will hold a public roundtable on the implementation of Vision Zero. Below are my comments since I won’t be able to testify in person.

Committee Chairpersons Cheh and Allen,

Due to schedule constraints, I am unable to testify at the Public Roundtable on the Implementation of the Vision Zero Initiative and the Bicycle and Pedestrian Safety Amendment Act of 2016 on September 27, 2018. I submit the following written testimony and hope if informs your discussions and decision making resulting from the roundtable.

When the Mayor announced the Vision Zero Initiative in 2015, I was enthusiastic. There was a lot of work to be done, but I believed declaring vulnerable road users the priority would lead to wholesale changes quickly in the city. There have been many successes since then, of course. I’m sure your government witnesses will highlight those, but I want to single out the Open Data work done by OCTO and data folks from the agencies. It’s simply outstanding and the folks at OCTO are incredibly responsive to issues I’ve encountered. Related, the number of geographic layers and geocoding of crashes and violations is simply outstanding and credit must go to the agency partners and their data folks.

With the niceties out of the way, I want to point out two glaring problems with the implementation of the two acts.

The first problem is easy to spot and easy to diagnose. In December of 2015, DDOT released proposed rule makings to implement further Vision Zero. After extending the comment period on that first rulemaking, DDOT didn’t release final rulemaking; instead, DDOT released a second rulemaking in January of 2017. DDOT twice extended the comment period on this second rulemaking and guess what happened next? Nothing. For almost three years, DDOT and the Mayor have refused to move forward on these critical rule changes.

Second, I want to push DDOT on the purported use of data to find dangerous intersections and to put safety of vulnerable road users first. As a member of the ANC 6B Transportation Committee, I used the OCTO open data to examine safety at our two-way stop signs. In 6B, there are 63 4-way intersections with all way stops and 17 4-way intersections with two-way stops. In the OCTO crash datasets, at those 63 intersections with all way stops, there are 591 crashes with an average of 9.4 per intersection within 109 feet of the intersection. At the two-way stops, there have been 227 crashes for an average of 14.2. Clearly, this data points to two-way intersections being more dangerous than four-ways.

So what happens when ANC 6B asks for the most dangerous two-way intersections to be converted? Traffic studies and pedestrian counts that say there’s not enough cross traffic for a four-way stop. But there’s less cross traffic because the intersections are dangerous. Anecdotes aren’t data, but on both bike and in a car, I avoid 12th/G St SE despite it potentially being a quicker route for some of my trips. This process repeats itself at 17th and A. At 10th and South Carolina. At 18th and East Capitol. At 16th and Massachusetts. At 5th and Independence. You get the idea.

I’ve used open data to determine the most dangerous intersections and have presented this data to DDOT. At the four-way intersections, by far the most with crashes in 6B is 17th and A streets SE with 52 crashes. The next closest was 35 crashes, at the four-way stop of 7th and E. 17th and A is a two-way stop. 17th and A is constantly cited by it’s SMD as the most dangerous intersection. 17th has speeding problems. This is not a complicated problem. Everyone will be safer with a four-way stop. Data shows this. But DDOT is unwilling to recognize this and fix this problem. If safety won’t be improved, DDOT should say this. But all we hear about is cross traffic and level of service and all sorts of things that make clear FHWA money and commuter times are priority number one and vulnerable road users aren’t.

Good luck crossing here

This is not to complain specifically about this intersection, but to show that the data portions of Vision Zero are working. The implementation is failing. I encourage you to bring this example up with your government witness and push them to use data to implement safety improvements.

Thank you for hosting this roundtable.

(I’m currently cleaning the data referenced above and will post it to the Data Analysis when it’s ready)