My son, age 16, was riding his bicycle yesterday with his 14-year old friend, and was issued an NYPD summons at 8:40 pm last night in Bay Ridge, Brooklyn 11209. The summons states that he was in violation of penal law sec 240-20 sub 5. The summons states that the officer is with 68 precinct of NYPD, Squad A/C. The summons says we have to show up in criminal court in November at 346 Broadway, on school day no less. We don't understand how this relates to my son's bike riding activity. My son did exactly what I taught him to do, and I see no fault in his actions. I don't know how he "obstructed vehicular traffic" in any way. What do we do?

Circumstances:
My son was going uphill east on Bay Ridge Ave, which is a two way road. He was riding his full size bike (equipped with rear and front safety LED lights,) on the pavement, while his 14-year old friend was riding his BMX bike on the sidewalk. My son got on the sidewalk when he heared the siren of a passing fire truck. He got off the sidewalk and back on the street in the same direction after the truck passed. A beige Ford Taurus wagon was moving very slowly ahead of him in the same direction and no other moving vehicles were nearby. Suddenly the beige Ford wagon turned on its police lights, and three officers signaled the 14-year old to stop; A female officer told my son to go on the sidewalk too and proceeded to question him and note his identity information. She handed him the summons without any explanation of what he did wrong. One of the other officers questioned the 14-year old and called him a F'ing liar because he did not believe him. When the friend told him to come see his parents, who live close by, the officer backed off. The third officer pulled over a delivery boy riding a bike on the sidewalk as well, and proceeded to question him.