It's not off-topic at all. The question posed was about the operational cost delta between different technologies. Is it cheaper to operate a fleet of buses, an LRT system or a heavy rail system? If the TTC wanted to it could replace all its planned LRTs with Volvo 7500 bi-articulated buses and run them at crush load. If they did that it might save them a substantial amount of capital costs, but it would cost them a lot more on the operational cost side. On Eglinton that very calculation was done during the EA and the finding was LRT is the most cost-effective mode for this corridor.