Would it even be possible to slow down the Tube while maintaining capacity? You would have to either make the trains bigger (not possible on most lines), or ad

Would it even be possible to slow down the Tube while maintaining capacity? You would have to either make the trains bigger (not possible on most lines), or add additional trains - expensive, and potentially a safety issue as you need to make sure there is always an evacuation route available. Some lines already operate with more trains in service at a given time than there are platforms on the line. This study sounds suspicious to me. I wouldn't be surprised if it were sponsored by cab companies, bus companies, and bike activists :)