A lot of airports do have stop bar lights at the entrance to runways, and some have even installed "follow the greens" systems. They're not common in the US tho

A lot of airports do have stop bar lights at the entrance to runways, and some have even installed "follow the greens" systems. They're not common in the US though. The issue here is we had two separate controllers giving clearances to the same runway at the same time. One told an aircraft to take off while another told multiple aircraft to cross. Might better technology have prevented this incident? Maybe. It would have been obvious that the runway is in use, so the aircraft crossing would likely have asked the controller to confirm instead of trusting the controller.