Earlier quoted context omitted.
Of course trolley buses (or streetcars/trams) can't do this
New trolley buses often have batteries, so they can run unplugged for some distance.
reattaching the trolley arms without stopping is not so easy
Why Do Buses Bunch?
151–153 of 153 posts
Re: Why Do Buses Bunch?
#152Earlier quoted context omitted.
If nobody signals to get off, buses sometimes will skip if they're bunched. I've seen it in at least three cities before. I have no idea if it's policy or if the drivers on those routes juts took matters into their own hands. I see bunched buses on the stop right outside my work basically every day. Sometimes four from one route and another three from another parallel route all within a ~5 minute span. Mercer in Seat…
Not stopping when nobody signals is the point of the signal right:).
Right I mean not stopping when there's no signal and there are people at the stop waiting to get on.
Re: Why Do Buses Bunch?
#153I enjoyed the callout to this when I was reading Google's Percolator paper a few years ago: > The random-scanning approach requires one additional tweak: when it was first deployed we noticed that scanning threads would tend to clump together in a few regions of the table, effectively reducing the parallelism of the scan. This phenomenon is commonly seen in public transportation systems where it is known as “platooni…
> To further the transportation analogy, the buses (scanner threads) in our city avoid clumping by teleporting themselves to a random stop (location in the table) if they get too close to the bus in front of them. Subway trains do this "to regulate service" iirc is the term used on the London Underground. Takt time［1］and Drum Buffer Rope［2］both related concepts of regulating flow through a process/system. ［1］ https:/…
I don't really understand why they don't "teleport". There are additional ways to get to a point ahead of a slowed down train with a replacement train, right? When you see one is dragged down too much and starts clogging, introduce a new train in front that jumps in at an expected schedule, then slowly empty the old train and take it out of the loop when its empty.
I haven't seen that but I'm not sure why its not done. I don#t think it will be more expensive in the long run than increasing slack. And the service experience and maintenance level is increased drastically.