Question

While it may seem to some of you that the rule is unfair it helps to keep everyone safe. Please walk your bike in a calm courteous manner and do not start riding it until you have reached the sidewalk beyond the crosswalk. Add commas

Answer 1

While it may seem to some of you that the rule is unfair, it helps to keep everyone safe. Please walk your bike in a calm, courteous manner, and do not start riding it until you have reached the sidewalk beyond the crosswalk.