If there is no stop line, stop at the crosswalk.

如公路上没有划线，在人行横道前停车。

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If there is no stop line, stop at the crosswalk, marked or not.

如果未划停车线，在人行横道前停车，不管人行横道有没有划线。

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Crosswalk as mentioned herein shall mean the planar intersection directly linking up with the road, with the width of its paved area on the railway line less than 2.5 meters.

所称人行过道，是指铁路线路上铺面宽度在2.5米以下，直接与道路贯通的平面交叉。

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It is most useful for seeing sharp contrasts, such as the painted white line of a crosswalk on a dark road.

WSJ: The Quest to Create A Bionic Eye Gets Clearer

Using a series of sensors, cameras and servos the car is able to turn the steering wheel plus activate the throttle and the shifter to navigate across this stretch of road, relying on the road markings painted on the floor to both keep it driving in a straight line and to have it stop, respectfully, at the crosswalk.

ENGADGET: Nissan NSC-2015 self-driving car with LTE and smartphone connectivity (test-ride with video)