As snow slammed the Sierra Thursday, drivers had to be extra vigilant as they traveled through the mountains. Chain controls, spin outs and low visibility led to traffic backups on Sierra roads. Some families took advantage of the slow down and played in the snow. Subscribe to KCRA on YouTube now for more: http://bit.ly/1kjRAAn Get more Sacramento news: http://kcra.com/ Like us: / kcra3 Follow us: / kcranews GGoogle+: http://plus.google.com/+kcra