Blocking devices must be applied to protect against opposing movements whenever which rule is in effect?

Blocking devices must be applied to protect against opposing movements whenever which rule is in effect?

• A. Rule 261
• B. Rule 260
• C. Rule 270
• D. Rule 280

Answer: (A)

Blocking devices are used to physically guard against a head-on collision when two trains could move toward each other. Rule 261 specifically requires that, whenever protection against opposing movements is in effect, blocking devices must be applied. This creates a safety barrier so an opposing movement cannot proceed into a block without proper clearance. The other rules cover different protections or procedures and do not mandate blocking devices for opposing movements in this context, making Rule 261 the correct one.

Blocking devices are used to physically guard against a head-on collision when two trains could move toward each other. Rule 261 specifically requires that, whenever protection against opposing movements is in effect, blocking devices must be applied. This creates a safety barrier so an opposing movement cannot proceed into a block without proper clearance. The other rules cover different protections or procedures and do not mandate blocking devices for opposing movements in this context, making Rule 261 the correct one.