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日本总重8吨(载重5吨)以上汽车驾驶室顶前沿装设的三个黄绿色灯就是速度灯。当车速低于40kg/h时,只左灯(面对汽车为右侧)亮,当车速在40～60km/h时,左、右两侧灯都亮,当车速超过
Japan’s total weight of 8 tons (5 tons load) above the car driver’s cab installed three yellow-green lights is the speed of light. When the speed is lower than 40kg / h, only the left lamp (the right side facing the car) is on. When the speed is between 40 and 60km / h, the lights on both the left and right sides are on. When the speed exceeds