The government decided to regulate the traffic 政府决定管理交通。
2.
Lights are used to regulate the traffic 红绿灯被用来管制交通。
3.
Lights are used to regulate the traffic 红绿灯被用来管制交通
4.
Police will monitor the traffic situation and implement appropriate measures and enforcement actions to regulate the traffic during peak hours 警方会于繁忙时间密切监察该区的交通情况、采取适当措施及严厉执法,以维持交通畅顺。