I'm not apirchik, but I have been in Tel Aviv on Yom Kippur and there are very few cars -- if any-- on the roads. Children do, indeed, enjoy riding their bicycles on the main streets there.

In fact, I live near an Arab village in the Galilee and have been told by friends there that most Israeli Arabs also do not drive on Yom Kippur -- simply as a matter of showing respect for the holiday.

One year, I had no choice in the matter -- I had to take somebody to the hospital in Safed (about 20 kilometers away) and did not see a single car until I was very close to the hospital.