but at nearly 10pm there isn't much traffic on the roads. the cars waiting to leave asda / retail park sit at a red light watching little or no traffic go along leckwith rd. A properly organised exit plan would see dozens / hundreds of cars leave the area and move onto leckwith rd / link rd in a seemless fashion with little disruption to local traffic still using leckwith rd.
Lights would still be used, but weight them for the traffic leaving the stadium, not the sparce numbers of vehicles passing the area.