slam on his brakes

slammed on the brakes， slammed on one's brakes 固定词组：紧急刹车。

At the overpass he slammed on his brakes and parked his truck on the wide concrete divider.

在立交桥上，他猛踩刹车将卡车停在了宽阔的水泥分隔道上。

divider 原意应该是分隔护栏，但是搞不懂大卡车怎么会停在了护栏上的，呵呵，所以我就译为分隔道了。