I read a novel in the late 1970s where a "hacker" breaks into a city's computer system and messes with traffic lights - does anyone remember the title? In the novel, the modified traffic light timing kills some joyriding teens who blow through an intersection counting on the light to stay green. At the climax of the book, the villain tries to kill off the protagonists by electronically locking the data center doors and triggering the CO₂ fire suppression system. Does anyone else remember this book? Was this "The Terminal Man" or am I mixing up two books?