Category: Safety

Study recommends designing bike paths for bikes, not for sharing

February 8, 2015 / / 7 Comments
running and bicycling on the lakefront trail

Some parts of the Chicago Lakefront Trail have a 2-foot wide side path designed for pedestrians but the study reviewed very cases where bicyclists crashed with pedestrians. It’s unknown if this side path results in fewer crashes than the parts of the Lakefront Trail without it. Photo: Eric Allix Rogers

The Active Transportation Alliance posted a link on Facebook to a new study [PDF] in the Open BMJ from December 2014, a free peer-reviewed “version” of the British Medical Journal, and said it “conclusively shows separated space reduces crashes and the severity of injuries when crashes occur”.

The posting was in the context that bicyclists and pedestrians using the Lakefront Trail should have separate paths. I agree, but there’s a problem in how they stated the study’s support for separation.

I wouldn’t say that the study “conclusively” shows that bicyclists would fare better on paths without pedestrians. The study reviewed fewer than 700 crashes in two Canadian cities. Only 11% of those crashes occurred on multi-use trails and only 5.9% of the crashes were with a pedestrian or animal (the two were grouped) – this sample size is too low from which to draw that kind of conclusion.

The study didn’t report the association (correlation) between crash severity and pedestrians. The authors didn’t even recommend that bicyclists and pedestrians have separate paths, but instead wrote “These results suggest an urgent need to provide bike facilities…that are designed [emphasis added] specifically for bicycling rather than for sharing with pedestrians”.

While I don’t discount the possibility that separating bicyclists and pedestrians in off-street corridors will reduce the number of crashes and injuries when those two user groups collide, it’s imprudent to call this study “conclusive” when linking it to the measure of crashes between bicyclists and pedestrians.

The study’s primary conclusion was that bicyclists crash more often when there are high slopes, fast moving cars, or no bike lanes and the authors recommended that bike infrastructure be built for bicycling. That’s a solid recommendation and I recommended that you sign Active Trans’s petition advocating for separate facilities in the North Lake Shore Drive reconstruction project.

We’ve already found all the ways to make bike lanes safer in the 43rd Ward

January 27, 2015 / / 3 Comments

Michele Smith, 43rd ward alderman seeking re-election, responded to Bike Walk Lincoln Park’s addendum questionnaire about active transportation issues in that ward (which also includes part of Old Town).

“We must continue to explore different ways to make our bike lanes safer given the narrow width of our roads.”

I would discuss these points with her:

1. The number of ways to make bicycling in bike lanes safer is very small. The two biggest problems are car doors and people parking their cars in the bike lanes. I don’t know Smith to have supported building the only bike lane type – a protected bike lane between a car parking lane and the sidewalk – currently in our city’s roster of possibilities that mitigate either of these problems.

2. The problem “given” isn’t the narrow width of roads. Streets in the 43rd Ward range in all sizes, from the very small one-way brick streets to the 4-6+ lane behemoths of LaSalle Boulevard, North Avenue, and Clark Street. The problem is one of allocation – storing things or keeping people moving. Again, see the lack of Smith’s support in the previous point. (No other candidate touched on this either*, and one pitted sidewalks against bike lanes, as if that was the choice that had to be made.)

Despite four years of Bike Walk Lincoln Park’s advocacy to redesign Clark Street I know of not a single person hired or a curb moved – aside from a lonely pedestrian island at Menomonee Street, peanuts compared to what’s been discussed as needed – to improve conditions for walking, bicycling, and transit use on this important connector that is currently a barrier for those modes.

* BWLP asked about moving parking spaces around and Alderman Smith mentioned that the city faces financial penalties when removing metered parking spaces from revenue service, even if temporarily. This is true, but she ignores that the city doesn’t do this on a permanent basis and instead finds unmetered spaces in equal-revenue-value locations that can be swapped.

Eight dead cyclists, but red light cameras are the worst

January 16, 2015 / / 0 Comments

Streetsblog Chicago reader David Altenburg left a salient comment this morning in response to the final tally of cyclists killed in Chicago last year after being hit by cars.

David's comment about cyclist fatalities and red light cameras

David’s comment about cyclist fatalities and red light cameras.

He wrote, “Is there any evidence that those cyclists who were killed were also issued improper tickets from red light cameras? Because if there is, then maybe we can get the current crop of ‘progressive’ mayoral candidates to give a shit about them.”

In 2013, three bicyclists died in car crashes, a fluke, because if you look at RedEye’s chart the annual average of bicyclist fatalities is 6 people. (There was a fourth cyclist death in 2013, but that was a train crash with the Brown Line.)

Anti-traffic safety is now a political platform

January 13, 2015 / / 5 Comments

Three of the five men running for Mayor of Chicago have pledged to eliminate enforcing red light running with cameras. Many aldermen have done the same. The Chicago Tribune has factually pointed out that Mayors Daley and Emanuel have mismanaged the red light camera program, with the bulk of it falling upon staff in the Daley administration. (The only part of the program under Emanuel that could be considered mismanagement was changing the business rules to issue tickets when the yellow light was recorded as 2.90 to 2.99 seconds long; Emanuel’s administration changed the rule back and has implemented many other changes following the inspector general’s report.)

Red light cameras lead to an increase in rear-end crashes but decrease the more severe angle (T-bone) crashes, which the Chicago Tribune “sorta” pointed out when it looked at frequencies but not injury costs.

Current 2nd ward Alderman Bob Fioretti, Cook County commissioner Jesus “Chuy’ Garcia, William “Dock” Walls, and Willie Wilson all have decided that neither the facts nor safety for people inside and outside of multi-ton machines are important. They are supporting the right to endanger others by respecting the inconvenience of not always being prepared to stop at a traffic signal.

Fioretti has said he will introduce soon an ordinance to remove red light cameras by April, but I haven’t found it in the legislation database.

Even though Streetsblog Chicago is no longer publishing, John Greenfield is hustling to get us both working again. In the meantime I intend to cover parts of the election, which takes place February 24, with assistance.

The City of Chicago should implement filtered permeability immediately at Green Street and Milwaukee Avenue

November 21, 2014 / / 2 Comments
This is not a bikeable block

The multiple threats to bicyclists, to pedestrians, and to motorists, are pervasive in the depicted scene. There is low visibility for turning motorists which in turn causes them to encroach on the right of way of other street users, including other motorists, bicyclists, and pedestrians.

This single image shows everything that is inefficient and dangerous to bicyclists and motorists about the intersection between north-south Green Street and diagonal Milwaukee Avenue in River West. Motorists should be physically blocked from entering or exiting Green Street at this point because of the danger inherent in the current intersection design. The block of Green Street south of Milwaukee Avenue is so insignificant to the driving network that no other design intervention should be implemented.

The situation depicted in this photograph demonstrates why the City should implement filtered permeability and close this entrance of the Green Street/Milwaukee Avenue intersection to motor vehicle movement. While motorists would be barred from entering or exiting Green Street here bicyclists would still have access to Green Street as part of the low-stress bicycling network of which Green Street is a part, between Milwaukee and Van Buren Street in Greektown.

I first wrote about this problematic intersection in June on Streetsblog Chicago and it remains an issue. One of the two motor vehicles ahead is blocking part of the bike lane while the second threatens to enter it. The bus on the left prevents the bicyclist in the bike lane from maneuvering around either vehicle. The photo below shows the situation from a different angle, that of the motorist wanting to turn left.

The vehicle operator on the left – a bus driver, in this case – has stopped the vehicle because they can occupy the intersection with the vehicle, or leave it open. Essentially, the bus driver has stopped to “let” the motorists on Green Street proceed across Milwaukee and further north into Green Street or turn left onto Milwaukee. Their movements would, again, put the bicyclist in danger, and put themselves and other motorists in danger because they are making nearly-blind turns into faster moving traffic.

The threats to the motorist are as limitless as the ones to the bicyclist (although the bicyclist will experience much greater injury if the threat is realized). As the motorist is paying attention to other motor vehicle traffic the bicyclist is coming down this bike lane – yep, I took the photograph – and is additionally obscured by the line of parked cars on the bicyclist’s right, and is in the shadow of the bus and the buildings. It’s like there’s a perfect storm of blind spots.

The quickest way to implement a system of filtered permeability and raise the significance and safety of the Green Street and intersecting Milwaukee Avenue blocks within the low-stress bicycling network would be to install a series of large planter boxes that prevent motorists from entering or exiting Green Street but allow bicyclists to filter through the planters.

And skip any traffic impact study. Not a single parking space will be lost or be made inaccessible with the implementation. A traffic study is not an experiment, but has practically been a foreboding document that has only ever said “things will be different”. (A good plenty of them have also suggested adding multiple $300,000 traffic signals.)

I read on Streetsblog USA recently about Pittsburgh’s new protected bike lanes:

“Instead of asking people to judge the unknown, the city’s leaders built something new and have proceded to let the public vet the idea once it’s already on the ground.”

Chicago maintains a Silver bike-friendly commenting ranking, yet my initial analysis shows that our metrics are below average among other Silver communities after which I’m led to believe we’re undeserving of the medal. Safety is a citizen’s number one concern when considering to use a bicycle for transportation and it will take an expansion of the low-stress bicycling network – currently not a priority – to deserve the current ranking or achieve anything higher.

Two bicyclists take different routes around this driver blocking the bike lane with their car

This photograph depicts a nearly identical situation but from the perspective of the motorist on Green Street approaching Milwaukee Avenue. Two bicyclists have taken two routes around the motorist blocking the bike lane with their vehicle.