Question

please note: leaving this page before submitting your assessment will result in failing this attempt. if you exceed the number of allowed attempts, you will be locked out of your course and required to re-register. 4) which feature distinguishes a controlled railroad crossing from an uncontrolled railroad crossing? a) presence of traffic signs and/or signals at the crossing b) location of the crossing in urban areas c) requirement for vehicles to stop regardless of train presence d) use of flashing lights only during daytime

Explanation:

To determine the correct answer, we analyze each option:

• Option a: Controlled railroad crossings have traffic signs (like crossbuck signs) and/or signals (flashing lights, gates, bells) to regulate traffic, while uncontrolled crossings lack these active control devices. This matches the definition of the distinction.
• Option b: Railroad crossings can be in urban or rural areas regardless of being controlled or uncontrolled, so location isn't the distinguishing factor.
• Option c: Vehicles don't stop regardless of train presence at controlled crossings (they follow signals/gates), and this isn't a standard rule for either type.
• Option d: Flashing lights at controlled crossings work day and night, not just daytime, so this is incorrect.

Answer:

a) Presence of traffic signs and/or signals at the crossing