Traffic lights might see a fourth signal as self-driving cars become more practical. Getty Images/iStockphoto The researcher’s latest plans differ from a 2020 model of a four-light intersection ...

HDOT modernized traffic signal systems at all 82 existing signalized intersections on Maui to allow connectivity between signals and to set up a cloud-based Advanced Traffic Management System (ATMS).

A traffic light for camels is seen at the Mingsha Mountain and Crescent Spring scenic spot on April 11, 2021 in Dunhuang, Gansu Province of China. Zhang Xiaoliang/VCG via Getty Images Chinese ...