31. 之字路 double bend road

    32. 之字公路 switch back road

    33. 下坡危險(xiǎn) dangerous down grade

    34. 道路交叉點(diǎn) road junction

    35. 十字路 cross road

    36. 左轉(zhuǎn) turn left

    37. 右轉(zhuǎn) turn right

    38. 靠左 keep left

    39. 靠右 keep right

    40. 慢駛 slow