Realizing what difficulties will be faced at different times can help the parents choose what is best for them. If travel is done by car during the day, be aware that most of the metropolitan areas have congestion during commuter traffic rush hours. Be aware of road construction along the route, which may, prolong the travel time. Those types of situations often cause tension for both the driver and occupants. Traveling by car, at night provides for less traffic headaches but the battle would be more in relation to driver fatigue.
Children are more apt to sleep during the night hours.
Drivers find the roadways easier to maneuver even through road construction areas. By having more that one driver that can relieve the tired partner can make the trip at night easier. Traveling by air can be just as tension filled as traveling by car. Choosing the best time of day for the children is key to a less chaotic flight. Remember that there are other passengers traveling with your family who may not be as accepting of children that are fraught because they are bored or their needs aren't easily met.