Driving at Night in Thailand: The Real Risks

Night riding on an unfamiliar rural road is, for most visitors, the single most dangerous thing they will do in Thailand. That is not a figure of speech and it is not a scare line: the risks that make Thai roads dangerous in the first place — unlit vehicles, alcohol, unsigned hazards, small bikes mixed in with heavy trucks — all get worse in the dark, and they get worse together. A large share of fatal crashes here happen after sunset, and the hours after the bars close on a Friday are the worst of them.

That said, "never drive at night" is useless advice, because sooner or later you will be out in it. What follows is what actually changes when the sun goes down, why, and how to give yourself the room the environment does not give you.

• Sunset, all yearRoughly 18:00-19:00, with almost no twilight
• Street lightingCommon in towns, rare between them
• Worst hoursLate evening and the small hours at weekends

The dark arrives faster than you expect

Thailand sits close to the equator, and the practical consequence is that dusk is short. In northern Europe you get an hour of usable half-light after the sun goes; here you get perhaps twenty minutes, and on a cloudy evening in the rainy season rather less. Riders who set out at five in the afternoon planning to "get there before dark" routinely find themselves doing the last forty minutes in full night, on a road they have never seen, with a helmet visor smeared with insects.

Build your day around that. If you are covering distance, work backwards from about an hour before sunset and treat that as your arrival time, not your departure deadline. On a long transfer, the difference between leaving at eight in the morning and leaving at eleven is often the difference between finishing in daylight and finishing in the dark.

What you actually meet after dark

Vehicles with no lights, or the wrong lights

The defining hazard of a Thai night road is the vehicle you cannot see. Small motorbikes with a failed headlight or bulb keep being ridden — a bulb is a low priority when the bike is somebody's whole livelihood — and they are frequently ridden on the hard shoulder, sometimes against the flow of traffic, because that is the shortest way to the shop. What you see, if you see anything, is a faint red smear from a tail light or nothing at all until your own beam picks up a shoulder and a rear wheel at ten metres. On unlit rural roads assume that any dark shape on the left-hand edge is a person on a bike until proven otherwise.

Agricultural vehicles are the other category: rot i-taen — the home-built farm trucks with a single-cylinder engine and a long steering tiller — plus tractors and trailers of sugarcane or rice straw, moving barely faster than a jog, with maybe one working lamp somewhere and an overhang you will not see at all. Behind a slow, wide, unlit load is exactly where a closing speed becomes a crash.

Full beam in your face

Thai driving practice is generous with main beam and sparing with dipping it. Expect oncoming vehicles to hold full beam through the pass, expect aftermarket LED conversions in old reflector housings that scatter light everywhere, and expect the occasional pickup running blue-white bulbs that are effectively a flashbulb at fifty metres.

The technique is simple and worth drilling until it is automatic: do not look at the lights. Drop your eyes to the left-hand edge of your lane — the white line, the kerb, the join between tarmac and dirt — and steer by that until the vehicle is past. Looking directly at an oncoming main beam bleaches your night vision for several seconds, and several seconds at road speed is a long way to travel effectively blind. If you are in a car, the same rule applies, and a clean windscreen matters enormously; a filmed-up screen turns each oncoming headlight into a starburst that fills half your view. If your hire car also has dark film on the glass, read what heavy tint does to your night vision before you set off, because the two problems compound.

Alcohol

Drinking and driving is common here, more common than most visitors assume, and it is concentrated exactly where you would expect: evenings, weekends, holiday periods, and the roads leading out of a town with bars in it. You cannot control this, but you can plan around it. Late Friday and Saturday nights are the ones to avoid; so are the evenings of national holidays, and the days either side of Songkran and New Year. It should not need saying that the rule applies to you too — the drink-driving limits are enforced, breath tests at checkpoints are routine, and a positive test after a crash changes everything about your insurance position.

Animals

Dogs move to warm tarmac after dark; it holds the day's heat and they lie on it. A sleeping dog on a black road, seen at the edge of a scooter headlight, gives you almost no reaction time, and dogs that are awake will run at a passing bike. That behaviour and how to handle it is covered in detail in how to ride past dogs on the road. Away from towns, add cattle and buffalo being moved home at dusk, and in a handful of places genuinely large wildlife.

Holes, edges and things that were not there yesterday

Almost every hazard in potholes and road surfaces becomes several times harder at night, because the visual cues that give a hole away in daylight — the shadow, the change of colour, the darker patch of a repair — all disappear under a headlight beam. A pothole full of water looks exactly like wet road. A dropped edge where the tarmac ends and the dirt shoulder begins is invisible until your front wheel is in it. Roadworks may be marked with nothing more than a branch laid on the surface or a stack of tyres, and neither reflects.

Riding at night on a motorbike: the specific problem

A rental scooter is badly equipped for night riding, and it is worth being blunt about why. The headlight is small, aimed for a rider of average local weight and often not aimed at all after a few drops. It throws a short, narrow pool of light that is easily washed out by oncoming traffic. You have no cabin, so rain and insects hit your visor directly. And you are the least visible thing on the road: a single small light among a hundred others, at a height most drivers are not scanning.

• Check your headlight — both beams — before you take a rental bike out, in the shop, in daylight.
• Clean the visor and the headlight lens before an evening ride. A film of insects halves your effective light.
• Wear something light-coloured or reflective over the top. A cheap high-visibility vest costs almost nothing at any hardware shop and works.
• Ride with dipped beam on and stay off main beam in traffic; on a small bike it buys you very little and blinds the people you most need to see you.
• Never ride the hard shoulder at night to overtake queued traffic. That is where the unlit bikes are.

Driving a car at night

A car is a considerably better place to be after dark, and if you are planning any serious night driving it is worth factoring that into how you rent. You get proper headlights, a windscreen, a roof and a steel shell. The trade-off is that you are faster, which brings its own arithmetic, and you are more exposed to fatigue.

Positioning and speed

Sit further back than you would at home. The vehicle in front of you is your only reliable early-warning system for holes, debris and stopped traffic, and you need enough gap to react to what it does rather than to what you can see. On a two-lane road, hold slightly further left than centre so that your beam does the work on the shoulder — where the pedestrians and unlit bikes are — rather than into the oncoming lane.

Overtaking

Overtaking at night on a two-lane Thai highway deserves real caution. Judging the closing speed of an oncoming vehicle by its lights alone is genuinely hard, and you are frequently pulling out to pass something slow and unlit whose actual width you cannot see. If the pass is not obviously clear, do not take it; the next straight is rarely more than a few minutes away.

Fatigue

Long distances in the dark, on straight roads, in a warm car, after a full day of heat, are a recipe for the kind of tiredness that arrives without warning. Plan the day so this does not creep up on you, and take the widely-available 24-hour service areas seriously as rest stops rather than pushing through.

Where night driving is worst, and where it is tolerable

Ten minutes of preparation that changes the odds

• Both headlight beams, brake light and indicators working — check them, do not assume. What Thai law requires is a separate question from what is actually fitted and working.
• Windscreen or visor clean inside and out. Inside matters more than most people think.
• Something reflective on you or the bike.
• Route loaded and the last few turns memorised, so you are not reading a phone in the dark.
• Fuel done before dark — rural stations close earlier than you expect.
• A plan B: the name of somewhere to stop if the weather turns or the road gets worse than you are comfortable with.

If you are on two wheels and cycling rather than riding, everything above applies with the volume turned up, and cycling safely in Thai traffic makes the case plainly: after dark, get off the road.

Frequently asked questions