 Since then, the southern terminus has been moved several times.In 1943, it was extended south along Thompson Avenue (formers SR 558) to the entrance of Tweed-New Haven Airport.In 1962, the southern end of Route 100 was relocated, taking over part of Route 142 to Silver Sands Road, ending at a reconfigured Route 142, which was changed to continue west along Silver Sands Road and modern Route 337.