Bits of Knowledge
The airbags expand at the same speed as the Shinkansen Bullet Train!
The airbags deploy at speeds of 100 to 300 km/h, the latter of which being the highest speed of the Shinkansen Bullet Train.
Souse : National Agency for Automotive Safety and Victim's Aid (NASVA) website
Do the airbags open in any crash?
Airbags deploy when the vehicle crashes at speeds greater than 20 to 30 km/h.Therefore, it won't needlessly expand during weaker impacts.
From where do the airbags expand?
The driver's airbag expands from the steering wheel, while the front passenger's deploys from the dashboard.
In addition, side and curtain shield airbags open from the seat and ceiling.