Multi lane streets are streets that have more than one lane in a direction. They create problems for cyclists because of left turns. However there are other problems with sharing multi lanes streets:
One is that higher speeds are sustained on these streets- ten or more miles per hour higher. Any speed over 20 mph is a problem for the average cyclist and multi lanes streets can get as high 50 mph posted limit.
Reduced space in the right lane because lanes a shareable lane was reduced to make way for more lanes.
The "inability" of drivers to move left because of traffic in the adjacent lane prevents drivers from changing lanes without having to slow down to the bicyclists speed and merging left is more problematic when a speed differential of ten mph has developed.

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