The disclosure relates to smart signs or physical markers for facilitating passenger trips for autonomous vehicles. For instance, a physical marker remote from the autonomous vehicles may receive a first notification indicating a request for a trip has been made via a client computing device. The physical marker may determine when the client computing device has reached a physical marker, and in response to the determination, the physical marker may send a second notification to a dispatching server computing device indicating that the client computing device has reached a physical marker. Other aspects of the disclosure relate to various features and uses for the physical marker.
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