ADDING SIDE MARKERS TO A '67 BARRACUDA - Locations and wiring

Effective January 1, 1968, all passenger cars built for sale in the United States were required (etc)

A+ for A56, who put up my kind of detailed and accurate description of the relevant lighting specs and regs.

Why sudden interest in side-on visibility of cars? Here's an image from a 2010 tech talk on the subject by one of America's rockstar vehicle lighting optical engineers, who started his career back in the sealed-beam days and ended it recently in LED times. Note one of the vehicles he used to make his point:

Sidemarker-impetus.jpg