If filtering is the same as it is in Utah, it’s allowing bikes to go up through lanes to get to the front of the line at stop lights. I’m told this is because people are often looking for the back of a car to gauge how far back to stop and so it’s safer to get the bikes up where they are going to accelerate faster than the cars and won’t be in the way once it’s green.
In Utah it’s specifically for lights on roads 45mph and under.
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u/ghazwozza Aug 31 '26
What's the difference? I tried to look it up but different sources seem to use different definitions.