Short answer: on hill roads, use a low gear going downhill so the engine does most of the braking, give way to vehicles coming uphill, sound your horn before blind bends, never overtake on a curve, and avoid driving after dark. Check the weather and road status before setting out in the monsoon or winter, and drive the foggy plains section of a winter trip in daylight.
If most of your driving happens on Delhi's flat roads, the first hour in the mountains feels very different. None of it is difficult once you know the technique.
Going downhill: let the engine brake
The most common mistake plains drivers make is riding the brakes all the way down a long descent. Brakes overheat and lose their bite, a problem called brake fade, which is the last thing you want before a steep hairpin.
- Use the same gear downhill that you would need to climb that slope, usually second or third. The engine's resistance holds the car's speed.
- Brake in firm, short applications rather than with constant light pressure.
- Never coast in neutral or with the clutch pressed. You lose engine braking and some control.
- In an automatic, use the manual or low-gear mode (often marked M or L, or with plus and minus) to hold a lower gear.
- In an EV, set regenerative braking to its strongest level. It slows the car and puts some charge back into the battery.
Going uphill
- Select a low gear before the climb steepens, not halfway round a hairpin.
- For a stop-start on a slope, hold the car on the handbrake while you find the clutch's biting point. Many newer cars have hill-hold assist, which keeps the brakes on for a moment as you move your foot.
- Watch the temperature gauge on long climbs. If it rises unusually, switch off the AC and stop somewhere safe to let the engine cool. Never open the radiator cap on a hot engine.
Hill road etiquette
- Uphill traffic has right of way on narrow stretches. If you are going down, pull into a wider spot and let climbing vehicles pass, since restarting on a steep slope is much harder for them.
- Honk before blind bends, and listen for horns from the other side. In the hills, a short horn is a safety signal, not rudeness.
- Keep left on bends and don't cut corners. Buses and trucks need the full width to get round hairpins, so stop and let them through.
- Never overtake on a curve or anywhere you can't see well ahead. Wait for a straight with clear visibility.
- Don't stop on a bend for photos. Find a proper pull-off.
- Avoid night driving, especially on unfamiliar roads. Fallen rocks, livestock and unlit trucks are hard to spot.
Monsoon: landslides and closures
From roughly July to September, heavy rain brings landslides and road closures across Himachal Pradesh and Uttarakhand, and some stretches stay shut for hours or days.
- Check IMD weather warnings and state or district updates before leaving and every morning of the trip.
- Keep at least one buffer day, and tell the rental company early if a closure will delay your return.
- Don't park or wait below loose slopes, and watch for small stones falling, which often come before a bigger slide.
- Don't attempt to cross water flowing over the road unless you can see the road surface and local vehicles are crossing safely.
- Expect low cloud on higher stretches. Drive on low beam and slow right down.
Winter: snow and black ice
Between roughly December and February, Shimla, Manali and the areas around them can get snow, and Nainital and Mussoorie occasionally do. The bigger hazard is often black ice: a thin, nearly invisible layer of ice on shaded stretches in the early morning and after dark.
- Drive slowly and smoothly, with no sudden braking, steering or acceleration.
- On snow in a manual car, pull away in second gear to reduce wheelspin.
- Leave several times your normal gap to the vehicle ahead.
- Treat shaded bends, bridges and early mornings with extra suspicion.
- After fresh snowfall, police may close roads beyond a point or allow only 4x4 vehicles or cars with snow chains. Follow their instructions, and check with the rental company about driving in snow before you go.
A compact SUV like the Hyundai Creta gives you more ground clearance for snowy or broken roads. If you specifically need four-wheel drive, confirm the exact variant before booking.
Fog on the plains in December and January
The trickiest part of a winter hill trip is often getting out of Delhi. Dense fog settles over the highways towards Chandigarh, Haridwar and Agra in December and January, especially before dawn.
- Leave after sunrise, once visibility improves, rather than at 4 am.
- Use low beam and fog lamps. High beam reflects off fog and makes visibility worse.
- Follow the left edge line, slow right down and keep a long gap.
- If you must stop, get completely off the carriageway and switch on your hazard lights. Rear-end collisions are the main fog danger.
- Some expressways lower their speed limits during the fog season, so follow the posted limits.
Do you need to worry about altitude sickness?
For the usual hill stations, no. Shimla, Manali, Mussoorie and Nainital all sit at roughly 2,000 to 2,300 metres, below the height where acute mountain sickness (AMS) becomes a real concern for most people. A day trip from Manali to Sissu through the Atal Tunnel, or up to Rohtang Pass, takes you noticeably higher, so take it easy, drink water and head back down if anyone develops a bad headache or nausea. Trips into Lahaul, Spiti or Ladakh need proper acclimatisation planning, which is a different kind of journey.
Route notes
- Delhi to Shimla: the climb starts around Kalka and Parwanoo, and snow and weekend traffic slow the last stretch in winter.
- Delhi to Manali: the longest hill section of the four, through Mandi and Kullu, with landslide-prone stretches in the monsoon.
- Delhi to Mussoorie: a short but continuous climb from Dehradun with many tight bends.
- Delhi to Nainital: the climb begins at Kathgodam, and roads in the town itself are narrow and busy.
Before you go, fill up in the plains, since pumps are fewer once you are in the hills, and download offline maps, because mobile signal drops in the valleys.