Riding Through Tunnels

Short Answer

Use lights, slow down, and judge each tunnel carefully. Some tunnels feel acceptable, while others are stressful or unsafe for bicycles.

Official Rule / Basic Rule

Rules vary by tunnel and road. Some tunnels may restrict bicycles, and signs should be followed.

RideNippon Advice

Turn on front and rear lights before entering, remove sunglasses if needed, and use a sidewalk or alternate route when the traffic lane is narrow and fast.

Why It Matters

Tunnels amplify noise, reduce visibility, and can make drivers less comfortable passing a cyclist.

Common Mistake

Entering a long tunnel without lights because it looked short from the outside.

When to Avoid

Avoid long rural tunnels with no shoulder during heavy traffic, rain, or dusk.

Related Situations

Road safety, Night riding, Route planning

Do

• Use bright lights before the tunnel.
• Check for bicycle restrictions.
• Choose alternate roads for long or narrow tunnels.

Don't

• Do not stop inside a tunnel unless absolutely necessary.
• Do not ride two abreast.
• Do not enter without rear visibility.