A computer system identifies a service provider from a plurality of service providers to fulfill a request for a transport service from a user device of a user. The service provider operates a vehicle equipped with an indicator device. The computer system obtains an output configuration associated with the user, monitors location information of a provider device of the service provider, detects a state change of the transport service based on the location information of the provider device, and, in response to detecting the state change, communicates with the provider device to cause the indicator device to display the output configuration of the user.