Score your ride
How to read the result
Risk band
We map the score to a 1–5 band: 1 = fine for anyone, 5 = expect to vomit without preparation. The score combines your personal history with the leg's specific severity (peak elevation gain, switchback count, road quality).
Best seat
Front passenger seat, ideally with the window slightly cracked. Back middle is OK for steady highway but worst on switchbacks. Reading or phone use multiplies the risk.
Drugs & timing
Dimenhydrinate (晕海宁/茶苯海明) 30 min before, or scopolamine patch (东莨菪碱贴) the night before for very long days. Ginger chews help mildly. Avoid heavy meals 1 hour before.
What this tool can't tell you
- The individual driver's style. Aggressive braking on hairpins is the worst trigger; ask the driver to ease off before you start.
- Whether the road has been freshly patched. Karst roads degrade fast; a recently resurfaced stretch is smoother but gravel patches are common.
- Whether fog has rolled in. Tongren→Fanjing regularly loses visibility in winter; that adds anxiety on top of motion.
- Whether anyone in your group is pregnant or has inner-ear conditions — for them even a "low-risk" leg may be too much.
Common questions
What's the single worst Guizhou leg for car-sickness?
Is sea-band or acupressure enough?
What about breaking the journey?
Sources & reference data
Leg severity indexed from on-the-ground reports 2024–2025, plus elevation data from 中国地形图. Personal risk buckets based on common epidemiological thresholds for motion sickness.