Regarding seat belt and airbag use, simulations show steering column intrusion leaves little survival space even at low speeds, so focus should first address energy absorption and compatibility issues before restraint systems. Impact data from six countries (Denmark, France, Lithuania, Luxembourg, Serbia, and the UK) suggest that in 963 bus driver fatalities and severe injuries, severity could potentially have been reduced with improved frontal protection. Cost-benefit analysis should include injuries to small vehicles in collisions with buses. UN R29 and UN R93 should be considered; UN R93 could be amended to include M₃ buses. A real-life demonstration test with a bus is proposed to validate studies conducted.