If they added hydraulic hybrid braking to the trains, they could capture 80% or more of the kinetic energy and reuse it to accelerate again. This would drastic

If they added hydraulic hybrid braking to the trains, they could capture 80% or more of the kinetic energy and reuse it to accelerate again. This would drastically cut down on heat. By way of comparison, electric batteries can capture maybe 20-25% of the kinetic energy. Uncaptured energy is likely turned into pure heat.