I suggest adding an option to enable or disable passing through poorly lighted streets or back roads after dark, for increased safety.
There are routes I have no issue taking during daylight hours, but that I'd be afraid to traverse after sunset. It would be terrific to be able to set the client to avoid those if I wouldn't complete the route before sunset. I do this proactively now, but because the client keeps trying to divert me to the faster back roads route, it doesn't, for example, route me around freeway accidents. Thank you!