RuskiSTL wrote: ↑Jun 09, 2022
Hypothetically, would you take 4 of these BRT lines? Or the one LRT line? If so which 4 would you choose first?
I'd personally choose one LRT line over all your BRT lines because all those lines closely duplicate service we already have and I'm not convinced BRT would be a dramatic improvement on ordinary bus service, while I'm fairly confident it would require a dramatic investment.
BRT literature talks about average speeds of thirty miles an hour or more, but inside of city limits that's pure fantasy land. The vehicles are still busses, with ordinary acceleration and handling, To get an average speed of thirty would either require the vehicles to never stop anywhere on their route, or to have operating speeds approaching sixty miles an hour, and the stretches you show simply wouldn't support that. You couldn't safely intersect with cross traffic at those speeds and you'd be constantly accelerating and decelerating hard just to get to those speeds on such short segments. I think a fair estimate would be about fifteen miles an hour on average, which is only about twice as fast as what we have now. And the more stops you have the worse it gets, since the stops are most of the time cost anyway. Add to that the fact that it's still a bus, with all the associations people have with busses. It won't really change perceptions any. I don't see that as a worthwhile investment.
LRT has some of the same problems. No matter where you put it it will be redundant, and the top speeds won't be dramatically higher. But you will get the benefit of signal priority and some crossing protection, so you will be able to more safely maintain those speeds. It will also probably have fewer stops, since that's just the expectation with light rail anyway. Fewer stops, but faster service. And it might appreciably change perceptions. People will see it as an investment. Companies might use it in their marketing materials. Developers might use it talking to a bank, or a government organization.
My fear is that BRT is basically LRT light. That it has many of the costs of LRT, but not all of the benefits. It's clearly going to fall somewhere between ordinary bus service and LRT. That's just the nature of the beast. And the middle thing is rarely the best. If you have three smart people picking numbers between one and a hundred you don't want to be in the middle. The top or the bottom will nearly always win, because they get the benefit of all the cases above or below them and the middle only wins if they picked exactly the right number. Well . . . BRT sure looks like that middle pick. If I'm taking a longer trip I want a train. If I'm taking a shorter trip I want a bus. When do I want a train-bus? Pretty much never unless I live at one stop and work at the next. I'm really not sold on BRT. Am I seeing something fundamentally wrong here?
To my thinking the best system connects (metro) trains and busses. I won't say N/S makes sense as LRT. But I'm pretty sure it doesn't make sense as BRT. That said . . . while decidedly interested in transportation, I'm no engineer. Just a composer. (And one time bus driver and railroad volunteer.) I will gladly accept I might be wrong. Just looking for an explanation of why BRT makes economic or engineering sense.