A computing system is can determine a match between a requesting user of a transport service and a matched driver traveling to a pick-up location of the requesting user. Based on the match, the computing system can transmit a trigger signal to the computing device of the requesting user. The trigger signal can cause the computing device of the requesting user to generate a selectable feature that, when selected, cause the computing device to prominently display a specified color on a graphical user interface of the computing device to facilitate a rendezvous between the requesting user and matched driver.