Authorities require drivers to use tire chains on some roads in the Donner Summit area.

有关部门要求司机在一些路段使用防滑。

“We have to attach tire chains to the rear wheel, otherwise it's very easy to lose balance when going up the unpaved paths that were at a near 90 degree angle, ” Li Lang, a 21-year-old motorcyclist, told local media.

21 的摩托车手李朗告诉当地媒体：“我们必须把绑在后上，否则在接近 90 度角的土路面上很容易失去平衡。”