When driving in Maui, it's crucial to be aware of certain roads that are often challenging or restricted by rental car agreements due to their difficult conditions. For your safety and to comply with vehicle guidelines, you should exercise caution or avoid specific sections of the Piilani Highway (Route 31) and the Kahekili Highway (Route 340).
Roads to Exercise Caution or Avoid in Maui
While many of Maui's roads offer scenic drives, some require heightened awareness or are best avoided, particularly if you are unfamiliar with the terrain or are driving a rental vehicle.
Piilani Highway (Hawaii Route 31)
This highway circles the southeastern coast of Maui. The section you should specifically avoid is south of Makena. Beyond Makena, the paved road often transitions to unpaved, rough, and narrow stretches, which can be challenging to navigate and may not be covered by standard rental car agreements. Driving on this part of Route 31 can lead to vehicle damage and safety concerns, especially after heavy rains.
Kahekili Highway (Route 340)
Located on Maui's west coast, Kahekili Highway is known for its stunning views but also for its demanding driving conditions. As you drive north from West Maui, Honokohau Bay marks a significant transition point where the Honoapiilani Highway (Highway 30) becomes Kahekili Highway (Route 340). Beyond this point, the road narrows considerably, becoming extremely winding, single-lane in parts, and often clinging precariously to cliffsides with steep drop-offs and blind turns. While passable, it requires extreme caution and is not recommended for inexperienced drivers or those uncomfortable with challenging terrain. Many rental car companies explicitly restrict travel on this section of road.
Overview of Challenging Maui Roads
| Road Name | Route Number | Section to Avoid/Caution | Key Characteristics |
|---|---|---|---|
| Piilani Highway | Route 31 | South of Makena | Unpaved, rough, narrow, challenging, often restricted by rental car agreements. |
| Kahekili Highway | Route 340 | Beyond Honokohau Bay | Extremely narrow, winding, single-lane sections, cliffside driving, steep drop-offs. |
Important Driving Tips for Maui's Challenging Roads
Navigating Maui's diverse terrain requires attention and preparation. Here are some essential tips:
- Check Your Rental Agreement: Always review your rental car agreement carefully. Many companies explicitly list restricted roads, and driving on them can void your insurance or incur penalties if damage occurs.
- Drive Slowly and Safely: On any narrow or winding road, reduce your speed. Be prepared for sudden stops, oncoming traffic (especially on single-lane sections), and unexpected turns.
- Be Aware of Local Conditions: Weather conditions can rapidly change, impacting road surfaces. Rain can make unpaved roads impassable and paved roads slippery.
- Yield to Oncoming Traffic: On very narrow sections, especially Kahekili Highway, there may not be enough room for two cars to pass. Be prepared to back up to a wider section if necessary, and yield to locals who may be more familiar with the road.
- Plan Your Route: Use reliable navigation apps but also consult local maps or ask your accommodation for advice on road conditions. Avoid driving these challenging roads at night or in adverse weather.
- Consider Alternatives: If you're uncomfortable with difficult driving conditions, consider organized tours that handle the driving for you, especially for areas like the "backside" to Hana or the challenging parts of West Maui.
