Some townships have roads with two numbers, e.g. "15/16 Sideroad", which refer to the lot numbers on both sides of the roads. On sprawling military reservations with tank schools such as Fort Knox Military Reservation and Fort Benning there are dedicated "Tank Roads" and "Cut-offs". In Montreal, "avenue" (used for major streets in other cities) generally indicates a small, tree-lined, low-traffic residential street. Exceptions exist, such as Park Avenue and Pine Avenue. Both are major thoroughfares in the city. In older British cities, names such as "vale", normally associated with smaller roads, may become attached to major thoroughfares as roads are upgraded (e.g. Roehampton Vale in London). In the Netherlands in the 1970s and 1980s there was a trend to not use the street type suffix at all, resulting in street names like (translated) "North Sea" and "Tuba". In some cities in the United States (San Francisco, Houston, Detroit, Cleveland, Memphis), streets have official suffixes, but they are not generally given on street signs or used in postal addresses. In Chicago, suffixes are given on street signs but often ignored in popular speech and in postal addresses. The name "Terrace" is sometimes associated with gated communities. Street type designations include:  Some major roads, particularly motorways and freeways, are given road numbers rather than, or in addition to, names. Examples include the M1 and Interstate 5. Many roads in Britain are numbered as part of the Great Britain road numbering scheme, and the same applies in many other countries. The same is also common in the United States; for example, in Washington, D.C., much of New York Avenue is U.S. Route 50. In York Region, Ontario, the former provincial Highway 7 (currently signed as York Regional Road 7) is still referred to as "Highway 7" on road signs and in everyday use, even though the road has not been part of Ontario's provincial highway system since 1998. In the western United States, parts of the old U.S. Route 99 were taken over and added into the respective states' highway system and numbered "99" in the 3 states that the U.S. Route use to run through California, Oregon, and Washington. This is true for several other historic U.S. Routes, such as Route 66. The opposite is true in Las Vegas, Nevada.