1927    The Holland Tunnel opens to traffic as the first Hudson River vehicle tunnel linking New Jersey to New York City.

1980    The St. Gotthard Tunnel opens in Switzerland as the world's longest highway tunnel at 10.14 miles (16.224 km) stretching from Goschenen to Airolo.

1987    British Prime Minister Margaret Thatcher and President of France François Mitterrand sign the agreement to build a tunnel under the English Channel (Eurotunnel).

2000    In Kaprun, Austria, 155 skiers and snowboarders die when a cable car catches fire in an alpine tunnel.