The state of Illinois is considering a bill that will allow (and mandate) undocumented immigrants to get driver's licenses. This bill begs the question, why is it important that undocumented immigrants be allowed/mandated to get legal driver's licenses?
Nationally, unlicensed motorists are five times more likely to be involved in a fatal crash than licensed drivers. Mandating licenses means mandating testing a person's driving skills. If undocumented people are allowed a legal way of obtaining a license that means we'll have more safe drivers on the road.
The issue then becomes will undocumented immigrants in Illinois be willing to, in a sense, 'come' out and be legally registered as undocumented immigrants. New Mexico has a similar law, and the state heavily benefited from the law. However, the law has been in place for nine years. There might be a delay in registering people in Illinois as they become more comfortable with the idea of having a legal US document that labels them as undocumented immigrants.