Sometimes there are roads with multiple lanes and certain lanes lead to certain exits, and it can be hard to change at the last minute. So, when you have the “Keep straight on” instruction with the multiple white arrows, maybe one could be blue or something to indicate that that is the ideal lane to be in for your route. Could also be helpful so that if you’re making a right turn at a light and immediately have to turn left once on that street, it would tell you to be in the left most right turn lane.