What procedure is required under Article 53 of the Implementing Regulation when stopping a vehicle on a public road?

1. Brake abruptly in the middle lane and switch on interior cabin lights
2. Stop facing the opposite direction of traffic to illuminate oncoming vehicles
3. Signal in advance, reduce speed gradually, and stop at the extreme right edge of the carriageway facing the direction of traffic flow
4. Mount the vehicle onto the sidewalk to keep the road completely clear