Parents should also be aware their children might rush across the road to see them after a long day at school, so waiting for them at the school gate might be a good idea.
He also reminded people that getting to and from work might take a little longer with school traffic, and if people wanted to leave for work five minutes early or start five minutes late it would help with congestion on the bridges.
Mr McDonald also encouraged parents to walk their children to school if able.
"If parents can walk their kids to school we do encourage that in this weather, because it teaches the kids road safety awareness and it's also an opportunity for you to have a good conversation with your kids."
He said parents with children could say hello to police officers if they saw them out. "They like talking to kids."