Motorcycles are allowed to use some of the HOV lanes
- only when they carry passengers.
- when signs "Motorcycles OK" are present. ✓
- because they do not disrupt traffic flow.
- only if they are over 500cc.
Answer: B. when signs "Motorcycles OK" are present.
Motorcycles may use HOV lanes when signs saying "Motorcycles OK" are present.
Why this is the answer
The handbook says HOV lanes are reserved for buses and carpool vehicles, but motorcycles, bicycles and taxis may also use them on some roads. It tells riders to watch for a sign reading "Motorcycles OK." That sign marks the HOV lanes where motorcycle use is permitted, so the permission depends on the sign rather than on passengers, traffic flow, or engine size.
Why the other answers are wrong
- A. only when they carry passengers. — Carrying passengers is not the condition the handbook gives; it points to the "Motorcycles OK" sign as the marker for permitted HOV use.
- C. because they do not disrupt traffic flow. — The passages do not say motorcycles are allowed because they avoid disrupting traffic flow; they tie HOV use to signs and road rules.
- D. only if they are over 500cc. — The passages give no engine-size rule for HOV lanes, so being over 500cc is not what decides whether a motorcycle may use them.
Remember it
No sign, no HOV: look for the "Motorcycles OK" sign before using the lane.