Where should everyone sit?

While the center of the back seat is statistically the safest place in the vehicle (because you can never take a direct impact there), it might not always be the best place to ride, depending on which type of seat belt it has. If the center has only a lap belt (no shoulder belt), it would not be the safest place for an adult or a child using a booster seat. These people are better served with a shoulder-and-lap belt that can offer upper body restraint not found in a lap-only belt.

A child in a rear or forward-facing car seat can ride very safely with a lap-only belt because they have the car seat's harness to offer upper body restraint.

Now that the newer taxis have shoulder-and-lap belts in all 3 rear seating positions, where someone sits is no longer much of an issue.