CDOT – Page 2 – Grid Chicago

CDOT fast to build new bikeways, but needs to rectify existing ones

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A properly installed sharrow, 11 feet from the curb.

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An improperly installed sharrow, 9 feet from the curb, that hasn’t been rectified in over a year.

A year ago I notified the Chicago Department of Transportation about some mistakes that were made in the installation of new bikeways. They replied October 25, 2011, with a description on how but not when they would be fixed. A year has passed and the fixes aren’t in. The first issue is “shared lane markings” (better known as “sharrows”) that were installed too close to parked cars after a construction project. The second issue is the case of bike lane signs far from any bike lane. Additionally, there are new (but longstanding) issues that are in need of resolution.

Sharrows too close

In the 2011 Chicago Bike Map, printed by CDOT, “marked shared lanes” are “usually established on streets with lots of traffic that are too narrow for bike lanes”. They consist of “special pavement markings [to] direct bicyclists to ride outside the ‘Door Zone'”. (The 2012 Chicago Bike Map omits these statements but they remain on the city’s bike map website and are printed in the federal manual of traffic control, MUTCD.) Continue reading CDOT fast to build new bikeways, but needs to rectify existing ones

Should I reconsider my support for the Damen-Elston-Fullerton intersection plan?

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An overhead view of the new design. View all images and site plans.

Ed. note: In the spring of 2011, I suggested friends and readers of my blog Steven Can Plan write letters to the Chicago Department of Transportation about the distinct lack of bicycle infrastructure in the plan to redesign the intersection and streets at Damen Avenue, Fullerton Avenue, and Elston Avenue. It’s more than an intersection overhaul. I then reported that it appears the letters you and I sent were positively received and bicycle infrastructure was added to the plan. The project, now set forth, will have three separated intersections (which should reduce the complexity of traffic signal cycles and automobile turning movements) all connected by roads with four travel lanes. Elston and Damen Avenues will have protected and conventional bike lanes, respectively. A Grid Chicago reader emailed us three weeks ago to ask us to reconsider our support for that design.

Tony Horvath lives in Lakeview and is a business analyst for Merrill Corporation. He doesn’t own a car but remembers the intersection from when he used to own a car and drove through it often. He commutes by ‘L’ but has also biked through the intersection and in the area. -Steven Continue reading Should I reconsider my support for the Damen-Elston-Fullerton intersection plan?

Construction update: CDOT readies Dearborn Street cycle track with bicycle signals

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There are four new signal heads in this photo. The worker I talked to said that one is for left-turning drivers, one is for northbound bicyclists, one is for northbound drivers, and one is for southbound bicyclists.

Chicago Department of Transportation Bureau of Electrical Operations workers were out in force on Saturday and Sunday installing new traffic signal poles and signals. The Dearborn Street cycle track project, a two-way bike lane on the left side of the one-way road, includes bicycle signal heads pointing north and south. Also new are signal heads for northbound Dearborn Street traffic that will turn left across the cycle track.

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CDOT is using 12-inches diameter bicycle lenses, the same size as non-bicycle lenses. Amsterdam and Copenhagen use much smaller bicycle signal heads. Continue reading Construction update: CDOT readies Dearborn Street cycle track with bicycle signals

Why Clark Street in Lakeview wasn’t a protected bike lane: it’s 1 foot too narrow

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Clark Street buffered bike lane just north of Diversey Avenue. Photo by Adam Herstein.

CDOT responded today to my inquiry asking why Clark Street between Diversey Avenue and Addison Avenue received a buffered bike lane and not a protected bike lane. Bikeways planner Mike Amsden writes:

Clark Street (Diversey to Addison) was striped as a buffer protected bike lane, and not a parking protected bike lane, because it is a 51′ roadway throughout the project limits. As you might know, the minimum roadway width for installing barrier protected bike lanes on roadways with one travel lane and one parking lane in each direction is 52′, and the preferred minimum width is 58′. A 52′ roadway allows for a 5′ bike lane, a 3′ buffer zone, an 8′ parking lane and a 10′ travel lane in each direction. However, even when a roadway is 52′, other roadway characteristics and operational considerations must be assessed before installing parking protected bike lanes. These characteristics include the amount of bus, truck and bicycle traffic, loading and delivery needs of local businesses, emergency vehicle access and maintenance requirements.

These standards come from the NACTO* Urban Bikeway Design Guide. If you have not read this guide I recommend doing so as it will likely answer many other questions you may have. The guide can be found here. http://nacto.org/cities-for-cycling/design-guide/

To answer your final question, if we were to recommend a parking protected bike lane on a 51′ roadway, all curbside uses (parking, standing, loading, valet, etc.) would have to be eliminated on one side of the roadway for the entire stretch in order to do so.

1 foot is all it takes, it seems. You can see the relevant NACTO standard in this image. Notice items 4, 5, and 6, that describe the minimum widths for the bike lane, buffer area, and parking lane, respectively.

Design guidance for One-Way Protected Cycle Tracks in the NACTO Urban Bikeway Design Guide.

Update: Why can’t certain lanes be narrower?

Someone asked in the comments this question, which Amsden anticipated: “We can’t go with a 7′ parking lane because then you’d have a 7′ parking lane next to a 10′ travel lane. People wouldn’t be able to get out of their cars, buses/trucks wouldn’t be able to maneuver, emergency vehicle access would be restricted, etc. That’s why even a 52′ roadway (with a 8′ parking lane next to a 10′ travel lane) is considered really tight.”

* National Association of City Transportation Officials, the yin to American Association of State and Highway Transportation Officials yang (AASHTO).

Fall bike lane construction update

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A Marking Specialists work truck in the Marshall Boulevard bike lane it just helped create (they work on weekends, too!).

Chicago Department of Transportation staff and its contractor Marking Specialists have been busy this summer and fall, striping miles of conventional, buffered, and separated bike lanes in Chicago. This post documents all of the new bike lanes we haven’t yet featured prominently, some of which are likely still under construction as the photos were taken between 1 and 4 weeks ago.

Sacramento Boulevard, 24th Boulevard, Marshall Boulevard

Still to come on this project through Little Village, Lawndale, North Lawndale: Douglas, Independence, and Hamlin Boulevards. It connects with a short, separated bike lane on Jackson Boulevard between Independence Boulevard and Central Park Avenue. The Central Park Avenue bike lane then connects north to separated bike lanes on Lake Street and Franklin Boulevard. Collectively these bike lanes are called “West Side Boulevards”. I like how this new separated bike lane “goes places”: through and to residential neighborhoods, past schools and parks.

People parked their cars in the bike lane, which we’ve found to be typical for under-construction separated bike lanes. The pavement quality issues that Franklin Boulevard suffers from are present on this project as well, in multiple locations (there’s a small bush growing in the bike lane a few feet before your reach a large pothole). I look forward to seeing the ultimate design created at the intersections and high-speed curves in Douglas Park and the pavement issues corrected. This project is likely still under construction.

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A separated bike lane on Marshall Boulevard, looking south at a Pink Line viaduct. It’s parking-protected in some locations. In this photo, new parking spaces are created where none previously existed. Continue reading Fall bike lane construction update

Business as usual: Wells Street bridge closure detour falls short of “8 to 80” bike planning

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A variable message sign on Wells Street at Hubbard directs traffic to LaSalle Street. There was no sign directing bicyclists, which is odd because this route on June 26, 2012, saw 679 riders from 7-9 AM at Chicago Avenue.

The Wells Street bridge closed on Monday, November 5, to all traffic (the sidewalks were open in the morning) so that the bridge can be rebuilt; a new concrete deck will be constructed providing a safer surface for bicycling. The Chicago Department of Transportation estimates construction will finish by December 1, 2013. To reroute traffic, CDOT posted a map and plan showing different detour routes for different transportation modes: one each for pedestrians, bicyclists, drivers, and bus operators.

Information on the street, however, doesn’t match the plan. People on bikes are directed by the map to turn left from Wells Street onto Kinzie Street and then use Clark Street to cross the river. Yet a variable message sign on Wells Street directs Wells Street traffic to use Illinois Street. One Grid Chicago reader told us that changing lanes on his bicycle, during morning rush hour, from the bike lane on Wells Street to make a left onto Kinzie Street was difficult because many drivers were not turning left onto Illinois Street; in the subsequent days he took Clark Street from the north but found traffic to be worse. Continue reading Business as usual: Wells Street bridge closure detour falls short of “8 to 80” bike planning