It is legal in my area to ride on the sidewalk , but if there was a flashing cop car and traffic backed up , it meant an accident and the sidewalk might not be a good option . Besides , it could be tricky to get back onto the road from the sidewalk . So I stayed in the traffic . Ironically just today I read about car exhaust and bicyclists .

Based on the preceding passage, answer the following question Which is true of the sidewalk ?
It is not good for riding a bike .