can i use my nexus card in a non nexus lane
Along the Mexican border, NEXUS members may utilize Secure Electronic Network for Travelers Rapid Inspection (SENTRI) lanes when entering the US by land, but must be traveling in an approved, registered vehicle (SENTRI requires members to register their vehicles into the program, which involves a thorough inspection by CBP, whereas NEXUS has no such requirement). Regardless of whether the traveler is in an approved vehicle or not, the NEXUS card is a WHTI compliant document, and may be used in any standard lane from Mexico into the United States as proof of identity and citizenship. Pedestrians can use dedicated SENTRI lines for expedited entry into the U.S. from Tijuana at the San Ysidro border crossing.
NEXUS (frequent traveler program)