Metropolitan Transportation Authority (MTA) Assistant Conductor Practice Test

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What does a Working Limits Stop Sign look like?

A red diamond with STOP in the middle of it
A yellow diamond sign with a large S in the middle of it
A white rectangle with End of Block written in it
A rectangle on top split in half yellow half red

The correct answer is: A red diamond with STOP in the middle of it

The Working Limits Stop Sign is recognized as a critical safety signal used in rail operations. The correct representation of this sign is a red diamond shape featuring the word "STOP" prominently displayed in the center. This design is significant as the red color universally indicates a stop or caution requirement, while the diamond shape is a standard format for warning signs in many contexts, including railways. This visual standard helps ensure that all personnel understand its meaning, regardless of their training background, contributing to safety in work zones and preventing unauthorized movement in areas where work is being conducted. The specific combination of the red color and the diamond shape effectively communicates the need for immediate cessation of movement, making it an essential tool in maintaining operational safety.