What size switch can you go over at 30 mph?

What size switch can you go over at 30 mph?

• A. 15 switch
• B. 10 switch
• C. 20 switch
• D. 5 switch

Answer: (A)

The important idea is that how fast you can safely cross a turnout depends on its geometry or size. A larger turnout (higher-number) changes the wheel path more abruptly, so you need to slow down to keep the wheels on the rails. At 30 mph, the largest turnout you can safely cross is the one labeled as a 15-switch. A bigger turnout (like a 20-switch) would require a slower speed to stay safe, while smaller turnouts (5 or 10) are easier to handle even at higher speeds. So, 15-switch is the maximum size you can go over at 30 mph.

The important idea is that how fast you can safely cross a turnout depends on its geometry or size. A larger turnout (higher-number) changes the wheel path more abruptly, so you need to slow down to keep the wheels on the rails. At 30 mph, the largest turnout you can safely cross is the one labeled as a 15-switch. A bigger turnout (like a 20-switch) would require a slower speed to stay safe, while smaller turnouts (5 or 10) are easier to handle even at higher speeds. So, 15-switch is the maximum size you can go over at 30 mph.