There's a lot of writing online about pregnant women traveling by car,…

There's a lot of writing online about pregnant women traveling by car, buses, planes, and motorcycles. It's written that shaking is contraindicated. So can we say that pregnant women are left to travel only on electric trains? I already put off the motorcycle... Now I'm riding the bus and I understand how many potholes, lying policemen, as if on attractions you jump. Is it really harmful or only in the first and third trimester? Or even all the time? Who thinks so? Who decided this question for themselves?