left traffic meaning in English

左场周

" the project will improve the manoeuvring of northbound vehicles , particularly heavy vehicles , on the shenzhen side of the crossing and add to the capacity of the existing bridge , " the spokesman added . " by segregating southbound and northbound traffic , traffic flow and safety will be enhanced . " northbound goods vehicles are advised to keep to the left traffic lane and passenger vehicles to the right lane on the new bridge
他补充说：沙头角口岸新跨界桥的落成和启用将改善北行车辆，特别是重型货车在深圳方面口岸的行驶情况，也可增加容车量。而将南北行交通分流，车流及交通安全均可获改善。北行货车在新桥上应尽量靠左线行车，载客车辆则应尽量使用右线。