Showing posts with label traffic signals. Show all posts
Showing posts with label traffic signals. Show all posts

04 October 2018

More Than Green Paint In Beantown

In which American city do motorists spend the most time in bumper-to-bumper traffic?

Hint:  It's not New York.  Or Los Angeles.  Or any other city in California.  And it's not Chicago or Detroit, either.

That distinction goes to Boston.  Residents of Beantown wouldn't be surprised:  After all, their city has long had a reputation for having some of the worst traffic in the United States.

It's such that fellow New Yorkers are amazed when I tell them I've cycled in Boston.  More than one Big Apple cyclist has told me he or she would never, ever ride in the New England hub. "Those drivers are crazy!," they exclaim.

My response is usually along the lines of, "Well, yes, you do have to exercise caution, just like you would in any other city."

One thing I have to say about Boston cyclists, though:  They have grown very sophisticated about cycling infrastructure.  No longer are they satisfied with the "green paint on the side of the road" approach to bike lanes.



Now Causeway Street, a major connection between the North and West Ends (and, until 2004, the site of one of the city's main elevated train lines), has a bike lane running down its center, separated from the east- and west-bound traffic lanes by concrete barriers.  This could be very important to commuters and recreational cyclists alike, as it links to the Connect Historic Boston bike path and ends with the New England Aquarium.



Also, the upcoming redesign of Commonwealth Avenue near Boston University will include bike lanes built into wide sidewalks and separated from cars:  an arrangement common in Europe.  The redesign will also eliminate a flaw such lanes have in other American locales:  At intersections, concrete platforms will be built between the bike path and auto lanes.  This is intended to force drivers to take slower, wider right turns.



Speaking of turns: The city's first bike rotary is under construction at a point (near the MBTA Forest Hills station) where new bike paths intersect with the city's Southwest Corridor path.  As Boston Globe reporter Adam Vaccaro wryly notes, it remains to be seen whether cyclists behave better in their rotaries than motorists do in theirs.  (That sounds like something a Bostonian would say.)

And, for traffic management, traffic signals for cyclists are also under construction.  I've seen a few here in New York.  In theory, they are a good idea, especially where bike lanes intersect with major roadways.  One problem I've seen is on the lane I often use when commuting to work:  It's a two-way lane for cyclists, but the street that runs alongside it is a one-way.  This creates problems when you are cycling in the opposite direction from the traffic:  The bike signal isn't always in sync with the cars, many of which are coming off the nearby expressway.  I hope the Boston planners are mindful of such things.

So far, it all sounds pretty ambitious and forward-thinking.  I am very interested to see how the new lanes, barriers and signals work.


05 October 2017

What If They Took Out The Traffic Lights?

Here's an experience that's in the "Don't Try This At Home" category:

Once, years ago, a NYPD officer pulled me over for riding through a red light on Broadway, just north of 23rd Street, in Manhattan.  He lectured me about how traffic lights are for everyone, and that I could endanger myself or others by not heeding them.  

At that time, I, as a cyclist, was even more of a minority than I am now.  Moreover, I was a messenger on duty that day, which made me even more of an outcast.  So I was not expecting that officer to understand what it was like to ride on city streets, let alone have any sympathy for me.

But I pointed out that I went through the red light ahead of two trucks that turned right when the light turned green.  Had I waited for the light, I could very well have ended up underneath one of those vehicles.

He put his pen down and looked at me.  I had the feeling he didn't trust me; after all, he'd probably heard all sorts of things from people who were trying to talk their way out of traffic summonses.  After what seemed like an endless silence, he said, "OK.  Just be careful."

"Good day, officer."

Now urban planners are starting, however slowly, something that cyclists have long known:  Following traffic signals doesn't always ensure a cyclist's, or a pedestrian's safety. If anything, at times--such as the situation I described--it can actually endanger us.  

Part of the reason for that is that, according to at least one study, signals can actually make drivers less attentive to their surroundings.  According to proponents of this idea, having fewer demarcations such as traffic lights, kerbs/curbs, traffic signs, road surface markings and regulations actually encourages cyclists, pedestrians and motorists to negotiate their movements with each other, usually through eye contact or hand signals.




The late Dutch traffic engineer Hans Monderman was one of the chief proponents of this urban planning concept, commonly known as "shared space".  His studies found that traffic safety and efficiency increased for all when public spaces were redesigned so that cyclists, motorists and pedestrians had to negotiate their movements with each other.  He went so far to say that the safest roads are those with the fewest marking, signs and traffic lights.

Meredith Glaser probably had his work in mind.  She's a researcher at the University of Amsterdam's Urban Cycling Institute (Can you imagine such a thing in the US?), which did a study of cycling in Alexanderplein, a busy intersection near the center of Amsterdam.  According to the study, about 40,000 cyclists ride through it every day--6000 an hour during peak times.  In addition, many pedestrians, automobiles and streetcars tranverse the crossroads every day.  

Institute researchers then asked 200 cyclists what they thought of the intersection.  "Chaotic" and "messy" were the most common responses.  Most said more traffic lights were necessary.

However, the researchers knew the city had a different plan:  The lights were shut off in May of last year.

While the lights were off,the researchers returned and asked another 150 cyclists for their thoughts.  About 60 percent said the intersection worked better without the signals.    The city's technical study found similar positive results, and no increase in the number of accidents.  In September, the city decided to remove the lights altogether, citing the fact that trams were not delayed and motor delays were cut in half.  In addition, bicycle traffic jams, usually caused by signals, were all but eliminated.

In the intervening year, the city has done similar things in other spots, with success.  Glaser thinks this could be a model for other cities in the world.  So does Dongho Chang, the Chief Traffic Engineer for the City of Seattle. "In an urban environment, you don't want a driver to be zoning out," he explains.  "You need them paying attention and looking for the unexpected."  He points out that only 8 percent of his city's intersections have traffic lights, but they account for 51 percent of accidents over the past 13 years.

Now, one obvious explanation is that the signalled intersections are the most heavily-trafficked and tend to have the most complex or complicated configurations.   Chang concedes as much, but also says that in such intersections, signals lead to dangerous behaviors such as speeding through a yellow light or accelerating quickly from a green.

Chang's, Glaser's and Monderman's points are well-taken.  However, they (perhaps surprisingly, in the case of Chang) fail to take into consideration something I, and other cyclists, know from experience:  Few American drivers have the level of awareness of cyclists most Dutch--or, for that matter, European--drivers have.  Seattle's drivers might be among the exceptions (I don't know:  I've never cycled there) but it's hard to imagine that even they have that level of awareness I found even in Montreal, less than an hour from the US, let alone cities in France, Belgium or the Netherlands.

Still, the work of the researchers and planners I've mentioned helps to indicate a greater truth:  Most cycling infrastructure, as it's currently planned, constructed and maintain doesn't make cycling--or walking or driving--safer.