User-to-vehicle interaction

In some exemplary processes for accessing a vehicle, a transit request is initiated. The transit request summons a vehicle towards a location of a user device. Information generated in response to the transit request is received. The information includes first authentication information and second authentication information. Third authentication information from the vehicle is received using a first wireless communication protocol. A determination is made as to whether the third authentication information corresponds to the first authentication information. In accordance with determining that the third authentication information corresponds to the first authentication information, a wireless communication connection is established with the vehicle using a second wireless communication protocol and the second authentication information. The second wireless communication protocol is different from the first wireless communication protocol. Using the second wireless communication protocol, instructions to unlock a cabin of the vehicle are sent.