Governor Rick Snyder has signed legislation allowing bicyclists to use an alternate right-turn signal, which backers say will make it easier for motorists to understand and help make roads safer for everyone. The law allows bikers to simply extend their right arm horizontally to signal a right-turn as well. The measure updates existing law from 1949 that required bicyclists to raise their left arm at a 90-degree angle to signal a right turn. That law was passed at a time when most automobiles lacked turn indicators and motorists also had to use hand signals.