Quote:
Originally Posted by someone123
I was talking on a more abstract level than whether the lights change or an arm comes down to block traffic. I meant that you can make an at-grade right of way that is not impeded by intersections if you want. It does come at the cost of less hypothetical traffic throughput on the cross streets or tracks, but maybe this is the right trade-off.
You can also take a fine-grained approach and decide that in one spot you want a signal arm, in another there will be a normal stop light, in another there will be an overpass or long elevated section, trench or tunnel, etc. Link light rail in Seattle is like this.
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I think all that was clear to begin with. Yes you can have one option, the other, or a mix, but it sounded as if you were suggesting that one could be as fast as the other and I'm simply pointing out that this isn't the case. The for legals and safety reasons, transit cannot operate at as high of speeds with simple signal priority as it can if physically separated. This wouldn't apply if the stops were close enough together that the train never reached those higher speeds to begin with, but then it would never be as fast the Skytrain either way. Maybe as fast as Bloor though.