VIDEO - Raised Center Medians
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I enjoy these videos by Road Guy Rob. He explains how the road structures that we use daily function in an easy to understand manner. In this video he takes on the subject of raised medians. On one hand, they prevent crashes, but on the other, they keep us from turning left where we might want to. This video explains how engineers decide how to build raised medians.

This case involves a collision between vehicles driven by
British Columbia's view of what consists of acceptable methods of transportation on our roads had changed considerably since I started policing in the 1980's. Back then, cars, trucks, motorcycles, bicycles and feet were pretty much all that was allowed. Devices like rollerblades, skateboards, motorized bicycles and scooters were either strictly controlled or forbidden completely.
When the light changes to green, drivers who intend to turn right or left are often focused on finding a gap in vehicle traffic to take advantage of. Pedestrians in the crosswalk are often not seen and a collision is the result. Leading pedestrian intervals are a simple walk light timing change that can help prevent these incidents.
BC's