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There are two main types of signaling aspect systems found in North America, speed signaling and weak route signaling. [citation needed] Speed signaling transmits information regarding how fast the train is permitted to be going in the upcoming segment of track; weak route signaling transmits information related to the route a train will be taking through a junction, and it is incumbent upon ...
The Underground Railroad was used by freedom seekers from slavery in the United States and was generally an organized network of secret routes and safe houses. [ 1 ] Enslaved Africans and African Americans escaped from slavery as early as the 16th century and many of their escapes were unaided, [ 2 ][ 3 ][ 4 ] but the network of safe houses ...
MBTA subway. The Massachusetts Bay Transportation Authority (MBTA) operates rapid transit (heavy rail), light rail, and bus rapid transit services in the Boston metropolitan area, collectively referred to as the rapid transit, subway, the T system, or simply the T. [2] The color-branded lines consist of three heavy rail lines (Red, Orange, and ...
The Los Angeles Metro Rail is an urban rail transit system serving Los Angeles County, California in the United States. It consists of six lines: four light rail lines (the A, C, E and K lines) and two rapid transit lines (the B and D lines), serving a total of 101 stations. The system connects with the Metro Busway bus rapid transit system ...
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of ...
t. e. The New York City Subway is a rapid transit system that serves four of the five boroughs of New York City, New York: the Bronx, Brooklyn, Manhattan, and Queens. [ a ] Its operator is the New York City Transit Authority, which is itself controlled by the Metropolitan Transportation Authority of New York.
ISO 22324. ISO 22324:2022, Security and resilience — Emergency management — Guidelines for colour-coded alerts, is an international standard developed by ISO/TC 292 Security and resilience. This document provide guidelines for color codes to indicate severity of hazards in public warnings. There are many different systems are already in use ...