You sit on the bus and mrt, you see a blind man walking on a car, but no car, and let him sit in Loei. So you're standing up and giving him a ride instead.
You sit on the bus and mrt you see the blind walked up on the car, but the car does not have room for them at all. You stood up and gave him a ride instead.
You are sitting in the car MRT and you see the blind walking up the car, but the car has no place for him to sit. You can stand up and let him sit instead.