When a long vehicle signals right but moves close to the left-hand kerb at a crossroad, what is the best action?

When a long vehicle signals right but moves close to the left-hand kerb at a crossroad, the best action is to wait behind the long vehicle. This situation typically indicates that the long vehicle is preparing for a wide turn that may necessitate it moving towards the left side of the road momentarily. By waiting behind the vehicle, you ensure that you remain at a safe distance and can observe the vehicle’s movements without risking a collision.

Taking action like overtaking on the right or shifting to the left can be dangerous. Long vehicles often require more room to maneuver than smaller vehicles, and trying to pass them when they are indicating a turn can lead to unexpected situations where they might not see you or anticipate your movements. Furthermore, honking at the driver may startle them or be misinterpreted; it's typically better to exercise patience in such scenarios.