That doesn't help when the typical work day is 11 hours long (1hr commute + 8 working + 1 lunch + 1hr home). It should really be a holiday since there is voting every year.
The polling locations have to make sense as well. My location is 2 miles from where I live in the opposite direction of my work, and the only way it is accessible is via auto. There is no sidewalks or shoulders to walk on to the place. It is also on a 5 lane state route, with a steep climb so biking it is a problem as well. There isn't even a bike rack to lock up at. I notice this because I'm a bike commuter as well.
In order for it to work for me, I have to be there the moment they open. Last time my wife was able to stay home with the kids and I traded her. She has a new job now that requires her leaving at 5:30. There is no daycare open that early (and mine is on the way to work).