One highway. Two dead ends.

Kauai has no rideshare to speak of (Uber and Lyft exist but drivers are rare and waits long), the bus runs only on the highway corridor, and the best parts of the island are not walkable to anything. Book a rental car before your flight.

SUV vs. sedan: a regular sedan is fine for 95% of trips. You only need a 4WD if you're driving the rutted road to Polihale or staying on Kokee mountain roads in heavy rain. Some rental contracts technically prohibit driving to Polihale — read the fine print if it matters.

Highway 50 + Highway 56 forms a horseshoe around the island. It does not connect — there's no road across the Napali Coast on the northwest side. To get from Hanalei to Polihale, you drive all the way around the south.

Approximate drive times (no traffic): Lihue airport to Poipu — 25 min. Lihue to Hanalei — 60 min. Lihue to Waimea Canyon top — 90 min. Poipu to Hanalei — 90 min. Hanalei to end of road (Ke'e Beach) — 35 min.

Kapaa, on the east side, has the only real traffic on Kauai. It backs up daily from 3pm–6pm in both directions. Avoid driving through Kapaa during evening rush if you can.

The road to Hanalei after Princeville crosses six one-lane bridges. Local etiquette: 5–7 cars cross at a time, then yield. Don't be the person who tries to sneak through.

The road past Hanalei dead-ends at Ke'e Beach, inside Ha'ena State Park. Since 2019, parking and access have been reservation-only via gohaena.com. Book 30 days in advance or you'll be turned around at the gate.

Alternative: the North Shore Shuttle ($40 round trip, includes park entry) picks up in Hanalei.

It exists, it's cheap ($2), it runs hourly along the main highway. It does not go to Hanalei, Ha'ena, or Polihale, and it doesn't run frequently enough to be a primary mode of transport for visitors. Useful as a backup if a car breaks down.

Gas is most expensive in Hanalei (often $1+/gallon more than Lihue). Fill up in Kapaa or Lihue before heading north.

Most beaches and trailheads have free parking but the popular ones fill by 9am. Arrive early or accept the walk from a side road.

Lock your car, don't leave anything visible. Car break-ins at trailheads (especially the popular ones) happen.