Labor Day travel: Plan ahead -- and be nice

Many children have gone back to school in the U.S., and the days are getting shorter, but there is still one more excuse to use the swimsuits and beach towels before packing them up: Labor Day.

Airports, highways, beaches and theme parks are expected to be packed for the long holiday weekend as a lot Americans mark the unofficial end of summer the same way they celebrated the season’s unofficial start: by traveling.

The Transportation Security Administration anticipates screening...