Answer: checkpoints

AnswerCrossword Clue
checkpointsA place along the route of a long-distance race where the time for each competitor is recorded
checkpointsA barrier or manned entrance, typically at a border, where travelers are subject to security checks
checkpointsCHECKPOINT, a point at which a check is performed
checkpointsA location whose exact position can be verified visually or electronically, used by pilots to aid navigation