I had rehearsals most nights at the Worm Creek Opera House, a dilapidated theater near the only stoplight in town. The play was another world. Nobody talked about Y2K.
" To run a red light" means to drive through what we would call an " intersection, " where two streets cross each other, when it is not allowed because the stoplight is red.
It means that cities are looking for ways so that stoplights can now that there's an accident right there, communicate to your self-driving Uber car, that there's an accident there and that they need to go a different direction.