51.   The court ruled the officers should have stopped the driver of a car that entered the race route and hit Pantani.

52.   The explosive case led to a national examination of criteria authorities use in stopping drivers.

53.   They flagged down a deputy, who stopped the driver.

54.   They drove away in a military truck, but later abandoned the vehicle and stopped a driver along a highway.

55.   Traffic patrols are a source of frustration for Mexico City residents, as officers sometimes stop drivers for minor infractions to extract small bribes.

56.   Sergeant Pat Tallon said the break came when two police patrol cars tried to stop the driver of a Mercedes-Benz for speeding.