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30 mph (48 km/h) N/A: No limit [71] N/A: 5 mph (8 km/h) United States [fn 16] 25–35 miles per hour (40–56 km/h) (Varies by State) 55–85 miles per hour (89–137 km/h) [fn 19] [fn 20] 40–65 miles per hour (64–105 km/h) [fn 21] Restrictions only in some states, typically 5–15 mph lower. None formally, though jurisdiction-dependent ...
Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...
SI, and hence the use of "km/h" (or "km h −1 " or "km·h −1 ") has now been adopted around the world in many areas related to health and safety [36] and in metrology [37] in addition to the SI unit metres per second ("m/s", "m s −1 " or "m·s −1 "). SI is also the preferred system of measure in academia and in education.
In 1941, a speed limit of 70 mph (113 km/h) was established, only to be reduced to 35 mph (56 km/h) during the war years (1942–45). After WWII, the limit was raised to 70 mph on the four-lane sections, with the two-lane tunnels posted at 50 mph (80 km/h) for cars and 40 mph (64 km/h) for trucks.
[2] [3] [4] There is no statutory speed limit for grade-separated freeways; however the typical speed limit in most provinces is 100 km/h (62 mph) or 110 km/h (68 mph). Statutory speed limits for school zones tend to be 30 or 40 km/h (19 or 25 mph) in urban areas and 50 km/h (31 mph) in rural areas. [ 5 ]
The Ohio Turnpike originally had a 65 mph (105 km/h) limit for cars and 55 mph (89 km/h) limit for trucks. The automobile speed limit was increased on September 30, 1963, in concert with other Ohio rural Interstates to 70 mph (110 km/h). [7] Exit 10 was rebuilt to provide access to Interstate 71 when that road was built across the turnpike.
If you're in the market for a new car, keep in mind that sticker prices don't include the cost of gas mileage -- or maintenance. Sometimes a set of wheels with a modest price tag can be among the ...
On 4 December 1973, the default open road speed limit got dropped to 50 miles per hour (80 km/h); this was partly a fuel saving measure in response to the 1973 oil crisis. When New Zealand metricated in 1975, the 50 mph speed limit became 80 km/h while the urban 30 mph speed limit became 50 km/h. [6]