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July 7, 2010

Motorist questions timing of city stoplights

One of the most common complaints received by Getting There is that the stoplights in Baltimore are poorly synchronized. Reader Jim Pappas makes that case with an impressive degree of specificity:

I recently changed routes to driving south on Charles Street from the Beltway to Johns Hopkins, to take my son to a summer camp for three weeks.

The timing of the lights on Charles Street during the morning rush hour is awful.  Most mornings I have caught every single light on my way south, including the small intersections at St Dunstan’s Road, Friends School, and Blythewood Rd.  The only ones that are coordinated are the two at Wyndhurst Rd / St. Alban’s Way and Homeland Avenue, which change together as a single intersection. 

 

As a matter of fact, my son I laugh as we watch the light at Charles and Cold Spring Lane turn green and the one at Overhill Road, about 200 feet south, turn red in about 5 seconds every single day, despite the fact that there are no cars at the intersection to trip the sensors, if there are any.

When I was growing up and lived off North Charles Street and regularly drove downtown with my father during rush hour, the lights were perfectly timed to let you drive at about 30 – 35 miles per hour and only hit one or two red lights all the way down town.  I am not kidding, one could drive from Northern Parkway and Charles to either Light and Pratt or Liberty and Pratt and hit one or two red lights.

Within about the last two years there were several articles printed in The Sun about the new computerized traffic light system being implemented in Baltimore city.  I don’t know what the status of the system is, but Henry Barnes’ 1953 system was working better in the 60s and 70s (with a much larger population) than the new system works today.

So my question is, what is the status of the computerized system and what is the City’s excuse for its poor performance?
So what do you say, city of Baltimore? Is Pappas dreaming this stuff up or does he have a valid complaint?
 
Posted by Michael Dresser at 3:48 PM | | Comments (9)
Categories: On the roads
        

Comments

Perhaps those lights are intentionally timed that way in order to slow cars down, making it safer for pedestrians and other drivers.

Moving cars as fast as possible isn't the only objective of the DOT.

As someone who drives South on St. Paul and North on Calvert daily between North Ave and Conway every day, I can say the lights are horribly timed. Occasionally when traveling North on Calvert I will get the situation where I will get a green and the next light will turn from red to green right as I come to a stop

I cannot disagree more that, by and large, the City's lights are timed very well, esp. when compared to surrounding juristictions, including Washington, DC.

There are a few problem areas that don't fit the pattern (like near President St), but often I can catch "the wave" of green lights on most main arterials.

Certainly some of the traffic engineers should chime in here, but IIRC the signals are timed to maximize inbound flow at the expense of cross traffic AND opposite flow traffic. Some times traveling in heavier traffic into downtown in the morning rush is faster than traveling outbound, even the the outbound direction has fewer cars. Maybe this section of Charles mentioned above has some new quirk to it, but farther south it works beautifully.

Of course, at a certain traffic threshold, nothing will move quickly and you'll get the red light.

Nate Payer
TRAC

COMPLETELY valid complaint. Similar situations occur daily around Cultural Center/State Center and MLKing: the next light turns red just as you're accelerating away from the first one, and the cycle repeats for block after block.

In fact, I don't bother reporting these badly timed lights to you because it's basically the city DEFAULT. Instead, what you specifically need to ask the City's traffic managers is for a SPECIFIC demonstration of WHERE their supposed $10 million traffic-light-synchronization program actually WORKS. Go ahead, ask them to show you before-and-after traffic times. Show you (and us) where they made what changes, and show results.

I don't buy that "slowing traffic to make it safer for pedestrians" poppycock. Ask them where, if anyplace, such a strategy is actually implemented. It's just unsynchronized lights, pure and simple. Hey, I'm not always driving against the larger volume of traffic, but I swear there's a transmitter in my car making every light I approach turn red.

Pappas is ABSOLUTELY right.

When I lived in Riverside/Fed Hill and drove through downtown to go to work, I swear I always hit every light.

Furthermore, I live in White Marsh now and drive into the city for school via a different route and have to stop at many lights on the way. The city's lights are full of flaws.

One former roommate of mine made a lot of sense when he said, "Sheila Dixon must be in bed with the gas companies because of these stupid lights!"

Valid complaint. One has to wonder where City Hall is in this issue. One of their top priorities is "Cleaner and Greener", right? Is it not more wasteful to have a vehicle go one block, stop, go one block, stop, etc.

Where is Capt. Planet (Councilman Kraft) when you REALLY need him?

An analogy I use is that, if you read a horrible book, you blame the author, not Microsoft Word. The same holds true with signal systems: someone has to come up with the numbers and enter them in the system; it just doesn't do it on its own. If the numbers happen to be bad, it's not the system's fault. Garbage in, garbage out.

In other words, you can spend whatever you want on these traffic systems, but at the end of the day, if you don't have the right people and processes in place to analyze what the system is telling you, respond to it, tweak the numbers, and review the results, it's not the system's fault. It's a management issue, not an engineering issue.

Granted, some of this has to do with agencies tempering expectations at the outset of these projects where these wiz-bang systems are installed. They have these grand press conferences with the director of the DOT standing in front of gigantic video displays of colorful maps and blinking displays, giving everyone the impression that the computer is going to magically give you the green everywhere you go. Uh, no.

Also, at some point, you have to realize that, no matter what street you are on, eventually you're going to hit a street that is more major than you are, and you're going to have to wait. That's life. I'm not trying to excuse poor timing, because there are plenty of instances of that; just trying to provide some perspective.

Valid Complaint.

I travel on Baltimore, from Patterson Park, to President/83 every morning and afternoon. I hit just about every light, though this trend seems to have occurred in the last 2-3 years. When I first started making this commute, 4 years ago, I recall a much better green to red ratio.

And the whole, "It's timed so it's safer for pedestrians/cyclists/other drivers" is a joke. The reality is, a lot of people actually go faster than normal, to try and make the light, and even then, run the red light.
Heck, I've been passed on Baltimore, when I was doing 30mph, just so someone could try and make the light.

@James D., you should try taking Lombard in the morning. Driving at 25-30 MPH, I can get from Wolfe Street to President Street, usually with no stops. In the evening, driving East on Baltimore from President is pretty well synchronized.

Also, Falls Road south from Northern Parkway in the morning can be a faster alternate into the city when 83S is backed up; it's also more scenic.

While there are definitely streets where all of the lights are synced, the city does a terrible job of publicizing which roads they want you to take. I've randomly found certain routes that work with the lights, but occasionally, the timing is changed and I have to find a new route. Other times, none of the lights are timed and zig-zagging across town is actually faster.

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About Michael Dresser
Michael Dresser has been an editor, reporter and columnist with The Sun longer than Baltimore's had a subway. He's covered retailing, telecommunications, state politics and wine. Since 2004, he's been The Sun's transportation writer. He lives in Ellicott City with his wife and travel companion, Cindy.

His Getting There column appears on Mondays. Mike's blog will be a forum for all who are interested in highways, transit and other transportation issues affecting Baltimore, Maryland and the region.
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