Today the river, coursing 2,700 miles, is the country's principal highway.

It thereby links the Estoril coastal area with principal highways towards the north of the country.

The sole interchanges built since then have been to connect the Thruway to other principal highways.

Pennsylvania Route 61 is the principal highway passing through Deer Lake.

A line of tanks probably three miles long on the principal highway.

The road for most of the way is one of the principal highways in Mexico, and it looks newly built.

Their gardens ran down to the river, which remained the principal highway.

Special Operations forces moved to the north of the city to cut off principal highways.

The trusts had powers to collect road tolls for the maintenance of principal highways.

Those fleeing created such gridlock on Interstate 10, the principal east-west highway, that many went back or pulled off to seek other shelter.