Signs & Signals

Baher Abdulhai is a professor at the University of Toronto and the director if the Toronto Intelligent Transportation Systems Centre and Testbed. One aspect of his work is artificial intelligence (AI) based street and freeway traffic control, traveler information systems, and emergency evacuation optimization.

Road Guy Rob is a civil engineer who delights in explaining traffic engineering to the public. In this episode Rob explains a bit about why these lights are placed where they are due to the horizontal and vertical angles that a driver sees.

Amid the chaos of a collision scene came a call over my police radio: "Grab that vehicle, it just drove around the cones and into oncoming traffic!" Not only did the emergency workers have to deal with a two vehicle collision in an intersection full of emergency vehicles, they also had to contend with drivers who were going through no matter what.

On a morning walk I found myself facing a young woman across a busy intersection while we waited for the traffic signal to change. She was facing me but keeping an eye on the van waiting beside her at the red light signalling a right turn. As I watched the situation unfold I was impressed with this woman's street smarts.

Here's an interesting question from the DriveSmartBC inbox: There is a mid-block pedestrian controlled traffic light in our neighborhood. Drivers frequently stop and then proceed through it if no one is in the crosswalk. Is this legal?

Question: Eastbound on Point Grey Road at Alma Street in Vancouver there are two bike lanes on the north side of the street that are allowed to cross Alma Street without stopping. On the diverter is a lane use sign for Eastbound traffic, "no straight ahead except for bicycles".

Here is another video from Road Guy Rob who explains about how engineering improvements can reduce the number of drivers who fail to stop for red lights through inattention or error.

One correspondent observed that "It seems that drivers in BC generally have a big problem when it comes to merging. In this case let's say from two lanes to one. In the normal course of events merging shouldn't be any hassle at all - take turns, one from the left then one from the right - it all moves along nicely, and has a minimal effect on holding up traffic. Not in BC! Here it appears to be everyone for him / herself.

Here is another video from Road Guy Rob. This time he observes that crossing the street on your bike should be easy and safe.  There are stop lights to help you, but they also invite cars onto your bike route.  Engineers in Tucson, Arizona solve this dilemma with two special signals just for bicycles: Toucans and BikeHAWKs.

Parking, stopping or standing, what's the difference and why is it important to you as a driver? Recognizing these road signs and knowing what is allowed and what isn't with regard to these three situations can mean the difference between your convenience and being ticketed and towed for ignoring or mistaking them.