When traveling more slowly than 40 mph on a limited-access highway, you should:

Sound your horn to warn others.
Use your high beams to warn others.
Use your hazard flashers to warn others.
None of the above.
Explanation

If you must travel more slowly than 40 mph on a limited-access highway, you should turn on your four-way flashers to warn drivers behind you. Moving significantly slower than the flow of traffic is dangerous and increases the risk of rear-end collisions. Always signal your intentions clearly-whether by using turn signals or emergency lights-so that other drivers can react appropriately. Many crashes happen because one driver does something unexpected, so clear communication is key to staying safe.

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