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A guide rail is a system designed to guide vehicles back to the roadway and away from potentially hazardous situations. [4] There is no legal distinction between a guide rail and a guard rail . According to the US Federal Highway Administration , the terms guardrail and guiderail are synonymous.
By the mid-20th century, most rail production was medium heavy (112 to 119 lb/yd or 55.6 to 59.0 kg/m) and heavy (127 to 140 lb/yd or 63.0 to 69.4 kg/m). Sizes under 100 lb/yd (49.6 kg/m) rail are usually for lighter duty freight, low use trackage, or light rail.
SAE J3105 is a recommended practice for automated connection devices (ACD) that mate chargers with battery electric buses and heavy-duty vehicles. The practice is maintained by the SAE International with the formal title "Electric Vehicle Power Transfer System Using Conductive Automated Connection Devices Recommended Practice", and was first issued in January 2020.
A variety of different types of heavy-duty clips are used to fasten the rails to the underlying baseplate, one common one being the Pandrol fastener (Pandrol clip), named after its maker, which is shaped like a stubby paperclip. [40] Another one is the Vossloh Tension Clamp. [41] Clips are an alternative to spikes.
Rapid transit or mass rapid transit (MRT) or heavy rail, [2] [3] commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separated rapid transit line below ground surface through a tunnel can be regionally called a subway , tube , metro or underground .
The Meigs system involved two lower load-bearing rails and a central gripper-traction rail, but it has habitually been referred to as a monorail in published sources despite not being one. There is a passing resemblance to the Lartigue Monorail , which in contrast had a central load-bearing rail and two lower guide rails.
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