The SS163 Is Not a Highway

I said the word “highway” out loud exactly once on this trip, in the rental car office at Naples airport, and the woman behind the counter looked at me the way you’d look at someone who just said they were planning to swim across the strait. She didn’t correct me. She just handed me the keys and said, quietly, “Take it slow on the coast road.” I didn’t understand what she meant until about forty minutes later, somewhere between Vietri sul Mare and Amalfi, gripping the wheel with both hands on a curve I hadn’t seen coming.

The SS163 is the road that runs the length of the Amalfi Coast, and if you’ve only seen it in photos, it looks like a ribbon laid gently along the cliffs. What the photos don’t show you is the width. In long stretches, the SS163 is a single lane in each direction with no shoulder, no barrier beyond a low wall, and a cliff face on one side that comes close enough to touch from the passenger window. This is not a highway in any sense of the word — no multiple lanes, no gentle curves engineered for speed, no forgiving margin for error. It is a road built for mule traffic that got paved over, and it still behaves like one.

What I actually found on the road

The hairpins are the first thing that reorganizes your expectations. These aren’t the sweeping curves you get on a mountain pass — they’re tight, blind switchbacks where you can’t see what’s coming from the other direction until you’re already committed to the turn. I lost count of how many times I tapped the horn before a bend, which is apparently standard practice here and not just nervous tourist behavior. Locals do it too, because visibility around these corners is often close to zero.

Then there’s the width problem in the villages themselves. Driving through the center of Positano or Praiano, the road narrows further, squeezed between buildings, and you’ll find yourself inches from parked scooters, café tables, and pedestrians who step into the road because there’s often no separate sidewalk. I pulled my side mirror in more than once just to get past a delivery van coming the other way.

What surprised me most was how much of the coast I saw only in passing, because there was never a safe moment to stop and look. The Fiordo di Furore appears for maybe two seconds through a gap in the rock before the road swallows it again, and the turnoff for the Emerald Grotto at Conca dei Marini came up faster than I expected, with barely enough warning to signal. Past Amalfi heading east, the road eases slightly through Vietri sul Mare, Cetara, and Atrani, but even there the lanes stay narrow enough that you’re still watching the road, not the ceramics shops or the fishing boats.

In peak season, the coast adds a layer of regulation on top of the geography itself. Amalfi, Positano, and Ravello all run ZTL (zona a traffico limitato) restrictions during the busiest months, which limits or controls vehicle access into their historic centers. I had assumed, wrongly, that this was something I could figure out on the fly. It isn’t — the restrictions are tied to specific streets and specific hours, and getting it wrong means a fine that arrives by mail months after you’ve gone home. In some of the tightest stretches, traffic doesn’t even flow in both directions at once. The road narrows to a point where cars alternate — one direction waits while the other passes — sometimes managed by a traffic light, sometimes by a person standing in the road with a flag, sometimes by nothing more than drivers making eye contact and negotiating who goes first.

The buses changed how I drove

Nothing recalibrated my sense of the SS163 faster than meeting my first SITA bus coming the other way on a blind curve. These are full-size coaches, and they run this road constantly, all day, in both directions, on the same lanes I was white-knuckling through in a compact rental. Watching a bus driver take a hairpin that barely fit his own vehicle, while somehow leaving no room for anyone coming the other way, taught me more about this road in ten seconds than any guidebook had.

The buses have priority in practice, whether or not that’s written anywhere. On the tightest bends, the accepted local move is to pull as close to the cliff wall or the edge as you safely can and let the bus through first. I started doing this instinctively by day two, because the alternative — two vehicles inching past each other with centimeters to spare, one of them the size of a small building — is not something I wanted to negotiate twice in the same afternoon.

I want to be honest here: none of this made me regret driving it. But I stopped thinking of the SS163 as a scenic drive I could do half-distracted, glancing at the sea whenever I felt like it. It demands constant attention. The view is genuinely extraordinary, but you take it in in glimpses, at pull-offs, or as a passenger — not while you’re the one behind the wheel on a blind curve with a bus coming.

Why so many visitors skip driving altogether

After two days of this, I understood why so much of the coast’s own advice steers first-time visitors toward the SITA buses or a private driver instead of self-driving. It isn’t tourist caution for its own sake — it’s a realistic read of what the road actually is. A private driver who does this route daily reads the curves, the bus schedules, and the seasonal ZTL rules in ways a visitor never will in a week.

If you’re weighing whether to rent a car at all, it’s worth reading up on driving the SS163 specifically before you commit, and comparing it honestly against getting around without a car. Both are legitimate ways to see this coast — they just come with very different afternoons behind the wheel. Our SITA bus guide covers routes and timing in more detail, and a well-planned 3-day itinerary can be built almost entirely around buses, ferries, and walking.

Some of the best hours I had on this coast didn’t involve the SS163 at all. A morning on the Path of the Gods or an afternoon kayaking along the base of the cliffs put me closer to the coastline than the car ever did, without a single hairpin. And Capri, reached by ferry rather than by road, is worth treating as its own separate day — no SS163 involved, just the boat over from Sorrento.

For my own trip, I ended up splitting the difference: I drove for the flexibility on quieter mornings, and left the SS163 to the professionals whenever a bus or a boat could get me there instead. My gulf crossing to a catamaran cruise across the Gulf of Naples was, frankly, the most relaxing few hours of the whole week, precisely because nobody had to worry about a hairpin turn.

Practical notes if you’re driving it anyway

• Avoid arriving in Amalfi, Positano, or Ravello mid-afternoon in July or August, when ZTL restrictions and tourist traffic overlap.
• Use your horn before blind curves — it’s not aggressive here, it’s expected.
• When you meet a SITA bus on a narrow stretch, give way; you’ll lose less time yielding than trying to squeeze past.
• Book accommodation with confirmed parking before you arrive; street parking inside the villages is scarce to nonexistent in season.
• Consider basing yourself somewhere reachable without the coast road for at least part of your trip, such as Sorrento, and using ferries or organized transfers for the rest.

If your trip starts from Naples, it’s worth pairing this warning with a day that doesn’t involve the SS163 at all — a guided walk through Naples’ historic center or an evening moonlight tour of the city lets you settle in before you ever touch a hairpin. And if Sorrento is on your route, a guided day trip from Naples to Sorrento gets you along part of the coast without you having to read a single ZTL sign.

Frequently asked questions about driving the SS163

Is the SS163 a highway?

No. The SS163 is a narrow, two-lane coastal road with hairpin turns, no shoulder in most sections, and stretches so tight that traffic alternates direction. It has none of the characteristics of a highway.

Does the Amalfi Coast have ZTL traffic restrictions?

Yes. Amalfi, Positano, and Ravello all enforce zona a traffico limitato (ZTL) restrictions during the high season, controlling or limiting vehicle access to their historic centers at certain times.

Why do SITA buses matter so much for drivers on the SS163?

Full-size SITA buses run the SS163 constantly in both directions, often meeting oncoming traffic on blind hairpin curves. In practice, smaller vehicles are expected to pull aside and let buses pass first on the tightest bends.

Is it safe to drive the SS163 myself?

Many visitors do it successfully, but it requires constant attention: no distracted scenic glancing, careful positioning on hairpins, and awareness of bus schedules and seasonal ZTL rules. It is not a relaxed, casual drive.

Should I rent a car for the Amalfi Coast at all?

It depends on your itinerary and comfort level. Many visitors prefer SITA buses, ferries, or a private driver specifically because of the SS163’s width, hairpins, and seasonal restrictions rather than renting a car.

Are there alternating one-way sections on the SS163?

Yes, in some of the narrowest stretches, traffic can only flow in one direction at a time, managed by a traffic light or a person directing vehicles by hand.