What time are you holding the wheel?
What time are you holding the wheel? 🚗
Do you remember learning "10: 10" at the driving school?
However, in reality, there is no official standard for the grip position in Japanese driving schools, and it is left to the discretion of the 🤔
The U.S. National Highway Traffic Safety Administration (NHTSA) currently recommends 9: 03 or 8: 04.
"10 o'clock 2 o'clock" is explicitly deprecated in the original ⚠️
The reason is safety during airbag deployment.
After deploying the airbag, the arm is reported to make primary contact in just 13 milliseconds (0.013 seconds) 📚
What you want to be especially conscious of is how to grip "putting your thumb inside the rim."
NHTSA clearly states that the thumb should be along the front of the rim and not held from the inside of the rim 🛞
Japan's JAF also warned that if the backrest is too upright, the arms will become cramped, increasing the risk of injury when deploying ✨
Three things I want to be aware of from today
① How to grip at 9 o'clock 3 o'clock or 8 o'clock 4 o'clock
② Place the thumb along the front of the rim
③ Long distance resets the body with a break
I want you to be a little conscious of your grip from today 👋
If you notice anything, let me know in the comments 💭
─ ─ ※ Supplement to source
NHTSA "Using Efficient Steering Techniques" (National Highway Traffic Safety Agency)
Bass CR et al. The Interaction of Air Bags with Upper Extremities, SAE Technical Paper 973324 (1997)
Huelke DF et al. "Upper extremities injuries related to airbag deployments," J Trauma 38 (4): 482-488 (1995), PMID: 7723083
Atkinson P et al., An under-hand steering wheelgrasp produces significant injury risk to the upper extremityduring airbag deployment, PMID: 12361499 (2002).
Park S et al., A Study on the Assessment of Driver s Fatigue, SAE Technical Paper 2002-01-0784 (2002).
· JAF official "What is the correct driving posture?"
· National Police Agency "Standard of Driving Training at Designated Driving School"
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私も以前は教習所で習った「10時10分」の握り方を長年続けていましたが、エアバッグの安全性に関して調べてから意識が変わりました。実際にNHTSAが推奨する「9時3時」または「8時4時」で握ると、突然のエアバッグ展開に備えやすく、腕や親指の怪我リスクが減ると知って驚きました。 特に親指をハンドルのリムの内側に入れる握り方が一般的ですが、これはエアバッグ展開時に親指を傷つける恐れがあります。私も長時間運転時に手首の疲れや痛みを感じたことで、親指をリムの前面に沿わせるように変えたところ、手の疲れが軽減しました。 さらに、JAFの指摘するように背もたれの角度も重要です。背もたれが立ちすぎていると腕が窮屈な状態になり、エアバッグによる負傷リスクが上がるので、背もたれは少し後ろに倒し、腕は軽く曲げる姿勢がおすすめです。 長距離ドライブでは時々休憩を取り体のリセットを図ることも忘れずに。肩や前腕の疲労蓄積は運転の安全にも影響するため、こまめな休憩で疲労を最小限に抑えるのが大切です。 このように、正しいハンドルの握り方や運転姿勢への意識を少し変えるだけで、事故時のリスクを減らせるほか、疲れにくく快適なドライブが楽しめます。皆さんも 今日から自分の握り方をチェックしてみてはいかがでしょうか？
