And you can't see until you're about four miles from a congested area.

It is one of the most congested areas in the city.

They are often prohibited in congested areas of major cities.

Some safety experts say an answer to keep private planes away from congested areas.

They would then reach more congested areas, away from all suspicion.

There must be a better location than this congested area.

Most had been pressed into service in more congested areas, so that was unlikely.

"But there are people who like less congested areas," she said.

The problem is particularly serious in towns and other congested areas.

The very highest charges would be likely in the most congested urban areas.