Reducing HS2 train speed would cut emissions and noise, report finds

A small reduction in the top speed of trains on the planned high-speed line from London to Birmingham would increase journey time but massively reduce carbon emissions and noise, independent analysts tell MPsA small reduction in the top speed of trains on the planned high-speed line between London and Birmingham would increase journey times by just 4.5 minutes, but would massively reduce carbon emissions and noise, independent analysts have told MPs scrutinising the multibillion-pound scheme.Res