The interview taxi was an installation at Web Summit that I helped make for Mercedes.io with Jack the Maker. Prospective Mercedes employees could be interviewed on-the-spot at the conference inside a "taxi."
We 3D-printed a replica of the taxi lights and fare meter modules that were used in Portuguese taxis from the 60s, and I designed and assembled electronics that fit inside the taxi light and taxi meter. The interviewer used the "fare meter" we designed as a timer for the interview. When the interviewer started the counter, the green lights on top of the taxi were wirelessly turned off. When the countdown ended, a buzzer was triggered.