There is not much clearance for vehicles passing under this bridge.

车辆在这座桥下通过时没有多少余隙。

《牛津词典》

There is not much clearance for tall vehicles passing under this bridge.

高大的车辆在通过这桥时没有多大余隙。

youdao

There is not much (enough) clearance for large lorries passing under this bridge.

桥下没有足够的空隙供大卡车通过。

youdao