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mile per hour: mph ≡ 1 mi/h = 0.447 04 m/s: mile per minute: mpm ≡ 1 mi/min = 26.8224 m/s: mile per second: mps ≡ 1 mi/s = 1 609.344 m/s: speed of light in vacuum: c: ≡ 299 792 458 m/s = 299 792 458 m/s: speed of sound in air: s: 1225 to 1062 km/h (761–660 mph or 661–574 kn) [note 1] ≈ 340 to 295 m/s: Note
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour.It is used in the United Kingdom, the United States, and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
The improvements also would support a possible increase in maximum speed to 90 miles per hour (145 km/h) from the existing 79 mph (127 km/h). The speed increase would be implemented after the installation of positive train control safety technology, and it would reduce travel time by another 12 to 15 minutes. [14]
Within "business or residential" districts, exceeding the speed limit by more than 20 miles per hour (32 km/h) is considered criminal. Within "urbanized areas", 55 miles per hour (89 km/h) speed limit citations are given for "waste of a finite resource". This exception only applies within a 10-mile-per-hour (16 km/h) threshold.
The D Line (formerly the Red Line from 1993–2006 and the Purple Line from 2006–2020) is a fully underground 5.1-mile (8.2 km) [1] rapid transit line operating in Los Angeles, running between Koreatown and Downtown Los Angeles.
As highways are converted to mile-based exit numbers, sequential numbers will be posted on "Old Exit XX" placards on advance guide signs and gore signs for at least two years following the conversion. Mile-based exit numbers on I-4 in Volusia County, Florida, circa 2003. In this case, mile-based exits 111A and 111B had been sequential exits ...
Radar mile or radar nautical mile is an auxiliary constant for converting a (delay) time to the corresponding scale distance on the radar display. [1] Radar timing is usually expressed in microseconds. To relate radar timing to distances traveled by radar energy, the speed is used to calculate it.
The goal is to reduce transfer times to a few minutes, with a default time of no more than five minutes. In actual operation, the time span can be longer because of services running early or late, high passenger volume (such as rush hour ), or the need to assist passengers with disabilities.