1.【交】(between trains, buses)(同一路线车辆之间的)间隔距离, 发车间隔
The system uses a GPRS network to locate buses and establish the headway.这一系统运用GPRS网络对公共汽车进行定位并设定发车间隔。
2.to make headway
(make progress)取得进展；取得进步
There was concern in the city that police were making little headway in the investigation.市民担心警方的调查没有取得什么进展。