07box: the new route problem

When the existing transit system doesn’t seem to be meeting the needs of your organization or interest group, it’s tempting to decide that you need a new route, or even a new network.  Service demands are often presented to transit agencies in the form of demands for a new route, and these are sometimes implemented even though they have a weakening effect on the whole transit network.  A good network is a set of services that are all designed to fit together and work together efficiently.  If you just add a route without rethinking the network, you’re almost always reducing the overall efficiency of the network — and thus its ability to get people where they’re going.

If you currently have little or no service, then of course you can demand new service.  But if you already have a transit network and just don’t find it useful for your needs, it’s important to ask whether an investment in that network would help fix the problem, rather than inventing a new service that will duplicate the existing one.

Requests for new duplicative routes often arise where transit service is already running, but:

  • the frequency or span of service is inadequate, or
  • the existing service is hard to figure out, or
  • the existing service doesn’t stop exactly where you want, or
  • the existing service is considered unacceptable in quality for a particular interest group’s needs, or
  • a connection (transfer) is required for the trip that you care about.

Let’s look at each one.  At the end of this article, I’ll also come back to some practical considerations.

Frequency or Span of Service is Inadequate 

If you want more frequency or span (duration) of service, the last thing you want is a new service running on top of an existing one.  Frequency and span are expensive because (except on driverless metros) the cost of driver labor grows directly as you increase either of them.  Running twice as often doubles your operating budget, and so does doubling the number of hours per week that you run.

Operating cost also doubles with the number of route-miles or route-km you have to operate, so fewer routes mean more frequency.  So don’t propose a new route.  Lobby for more frequency and span on the existing one.

The Existing Service is Hard to Figure Out

Some published transit maps showing the entire network are so confusing as to be useless.  Frequent Network mapping is one solution.  But just because you can’t figure out the service doesn’t mean it isn’t there.  Demand that your transit agency create clearer information that makes the usefuless of the service to your community more obvious.  (I can help them with that!)  If your need is for downtown circulation, be sure to study the option of branding existing services as downtown shuttles.  

The Existing Service Doesn’t Stop Exactly Where You Want

If you represent a senior or disabled community for whom walking is a hardship, you probably do need your own route or service, or to be served by existing services — such as paratransit — specialised around those needs.

But if you’re an institution or organization that wants transit to stop closer to your building, a new route is unlikely to be the best solution.  A convention center or university, for example, can ignore the surrounding bus network and create a bunch of its own shuttles, but a whole transit system devoted to one destination isn’t going to be as frequent as what you could have if you worked with the system that exists.  Advocate for stops closer to your location.   

Note, too, however, that if your destination requires a deviation — typically because it’s set back from major streets — then transit can only deviate to you by infuriating everyone else that’s riding at that point.  In that case, depending on how big a market you are, the deviation may well not be justified.  In those situations, don’t invent a large shuttle system that you can’t afford to run frequently.  Instead, offer a really frequent shuttle by running the shortest line possible: a link from your destination to the nearest transit station where versatile service is availble extending in many directions.

Existing Service Quality is Unacceptable

All kinds of emotions get expressed through comments about service quality.  In some cities, for example, everyone is so attached to the idea that buses are only for the poor that the very idea of using the same buses for more diverse markets sounds absurd.  And in such cities, the quality of the bus service may have deteriorated to the point that broadening their market is simply impractical.

On the other hand, many transit agencies are developing the ability to meet customers part way on quality.  Transit service will never be luxurious, but the look-and-feel improvements in the bus over the last 20 years have been truly transformational.  So before you insist that your city’s buses are useless, ride one of the newer ones.  

There are things that you as a civic advocate can do about bus quality to bring it closer to what your constituents need.  You could demand the abolition of bus wraps that cover windows and make interiors gloomy.  You could advocate for a focus on customer experience in purchasing.  Understand that these things cost money, but they may be good long term investments if your view about the inadequate quality of your buses is widely held.  But you’ll get a better mobility out of these improvements to the commons than out of advocating a separate service just for your needs.

Existing Service Requires a Connection (transfer)

Efficient, abundant transit networks often require connections, because you can’t run direct service from everywhere to everywhere else.  This issue is discussed in Chapter 12 of Human Transit, but for a simple case study underlining the futility of new routes designed to avoid connections, see here.

Plan for Versatility

A very frequent transit line — and one that can justify other improvements such as good amenities and transit lanes — is designed for versatility.  It does not serve any particular identified interest group, but instead aims to be useful to many kinds of people for many kinds of purposes.  It does this by running straight, with a reasonable spacing of stops to ensure speed.  It also does this by forming part of an interconnected network.  Remember, it’s not the route that’s designed, but the network.  A route may be designed as it is partly because of how it fits into the larger structure that enables people to get wherever they’re going, not just to destinations along one route.

So if your mission is to serve a whole city or region, designing a transit route around any self-identified group of people is usually a bad idea.  Most successful and attractive transit seeks maximum versatility, by serving the most diverse possible range of demographics, trip purposes, and origin-destination pairs.  You can make exceptions where a single demographic group produces sufficiently massive ridership, as in some commute markets.  But in general, the way people self-organize and self-identify politically is a bad guide to how to meet their transit needs efficiently.  Everyone can draw the perfect transit line just for their interest group, but such proposals tell you nothing about what a good transit system would look like — one that maximized everyone’s ability to get where they’re going.

This series of articles is closed to comments, but you can comment here.

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Placeholder for discussion of the to-via problem.

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Placeholder for discussion of operating cost.

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Placeholder for discussion of personal mobility.

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Test page for Chapter 8 detail.

los angeles: deleting some lines can be fair

The New York Times today bewails the loss of Los Angeles bus line 305, which soon will stop running diagonally across the city's grid, from Watts to Beverly Hills and Westwood. 

4bus-map-popup

NYT reporter Jennifer Medina assumes this is purely a victimization-of-the-poor story, starting with this observation:

The 305 was one of several lines created under the consent decree, and it is the only direct route from the city’s impoverished southern neighborhoods to its affluent West Side, where legions of janitors, nannies and maids work each day.

Sounds sad, and it's easy to fill an article with interviews with 305 riders who will experience the deletion as a hardship.  But as that paragraph should warn us, 305 was a symbolic service.  It cannot have been relevant to very many people, not even to many people in the targeted demographic ("janitors, nannies, maids" according to the NYT).  Why?  If you explore the route and schedule [ Download PDF ] and look at how the route fits into the larger network ("System map overview" here), you'll notice:

  • Line 305 is a diagonal shortcut across a high-frequency grid, where trips between anywhere and anywhere can usually be made on lines running every 15 minutes or better with some are far more frequent than that.  Meanwhile, the Line 305 frequency is every 40-60 minutes.  [PDF]  That means that the 305 is the fastest path between two points on the line only if it happens to be coming soon.  If you just miss one, there's another way to get there faster, via the much more frequent lines that flow north-south and east-west across this entire area. 
     
  • The 305's low frequency exposes its riders to the risks of waiting for a single bus: you're basically making an appointment with one driver who may not show up for a variety of reasons.  Routing the same trips via the high-frequency grid means much higher reliability, because the abundance of buses along a line means you are less dependent on any one of them.
     
  • Most important, the alleged target demographic — trips from the "poor south" to the "affluent west" for domestic workers — was mostly not served by the 305.  Both the "poor south" and the "affluent west" are enormous areas.  So no one bus line was ever going to connect all or even most of the "poor south" with all or even most of the "affluent west." 

These points, but especially the last, identify a public transit service as symbolic.  Symbolically, the 305 links the "poor south" and the "affluent west," and thus helps everyone feel good about having served domestic workers.  In fact, the 305 runs through a small part of the vast "poor south" and a small part of the vast "affluent west," but it's still useless for most of the people making that kind of trip, because both areas are so large that no one bus line, or even five, could link all of the likely origin-destination pairs between them.

(You could take other buses in each area and transfer to the 305, but the low frequency of the 305 makes this very risky.  Once you've accepted the need to connect, you might as well ride along the main grid and connect with a high-frequency line to take you where you're going.)

This problem is why frequency and connections were invented.  The governing principle of transit in these core parts of Los Angeles is the high-frequency grid, which allows everywhere-to-everywhere travel at high frequencies with at most one connection.  Yes, it may be sad that some domestic workers who are used to zero-transfer trips are now going to have a one-transfer trip, but that only means that 305 riders will have the same level of transit mobility that everyone else has, including most domestic workers.  It also means that Los Angeles transit will be treating all of this demographic equally, rather than arbitrarily preferring people whose path happens to lie along Line 305.

The other moral of this story is even simpler: If your mission is to serve a whole city or region, designing transit routes around any self-identified group of people is almost always a bad idea.  Most successful and attractive transit seeks maximum versatility, by serving the most diverse possible range of demographics, trip purposes, and origin-destination pairs.  You can make exceptions where a single demographic group produces sufficiently massive ridership, as in some commute markets.  But in general, the way people self-organize and self-identify politically is a bad guide to how to meet their transit needs efficiently.  Everyone can draw the perfect transit line just for their interest group, but such proposals tell you nothing about what a good transit system would look like.

Nobody should be happy about the severe cuts being imposed on many US transit agencies that urgently need to move in the opposite direction.  But as in San Francisco in 2009, cuts are sometimes an opportunity to delete services that have passionate, well-connected defenders, but that simply don't make sense if your goal is a complete network that people can use to go wherever they're going.

frequent-rider discounts to decongest the peak?

Just in from the Aspen Ideas Festival, via Alexis Madrigal at the Atlantic.  Stanford Electrical Engineering and Computer Science Professor Balaji Prabhakar thinks he has the solution to peak overcrowding.

The frequent commuter program has two goals. One is to increase people's loyalty to the public transport system. We want people to be disloyal to their cars, to cheat on their cars. And the second major goal is to decongest the peak time trains and buses. The problem is that it is unpleasant to take a trip during the peak time. If we could achieve both goals with the frequent commuter project, it would be great.

The nice thing about this project is that it is going to do exactly what the airline miles do. You take a 10 kilometer trip, you get 10 credits. And Singapore can measure the kilometers. But if you make that same trip in the off-peak time, you'll get 30 credits. This creates new bonding between you and the system. People don't think of the indignity of taking a three-stop trip on their preferred airline versus a direct cheaper flight sometimes. In fact, they see the angle as, "I'm earning more miles."

Does anyone with regular experience in transit think this is a good idea?  If so, I'd like to hear.  My first reaction:

This sounds like a very very complicated way to do discounts for off-peak riders, and to reward very regular riders.  The fact is, the transit industry already has a system for rewarding frequent riders; it's called a monthly or annual pass.

A simpler solution to the peak overcrowding problem is to provide discounts for off-peak trips, as Seattle, for example, has done for decades.  This costs very little to administer and has the desired effect much more directly. 

When the need for sheer service is so urgent, why would a transit agency take on the massive administrative cost of a frequent-rider program, when the same money could go into driving buses and trains instead? 

I'm sure transit professionals will appreciate the interest from the "big ideas" people.  But from Madrigal's summary, this idea sounds like a fun metaphor inappropriately applied, suggesting the lack of any technical understanding of the transit capacity problem.

But I'm curious what others think …

reims: the “strong lines” of the “bus-tram network”

Reims
The opening of a new tram (streetcar) line is usually the occasion for lots of hype and celebration about trams.  But Reims, France is using the opening day of a new tram to pitch a newly integrated network, the "Réseau Bus-Tram."  The term clearly invites us to stop thinking of buses and trams as separate things, and forming attachments to one or the other.

Reims lignes Their description of it in their timetables [PDF] shows a focus on promoting a network of main lines (Lignes fortes), which consist of two tram lines and five bus lines, all very frequent and designed to complement each other.  The name lignes fortes suggests not just main lines but also (more literally) strong lines, strong enough to be the structure that supports all the other transit lines in the city.

(Just home from Halifax.  More on that soon, though come to think of it, this post is about Halifax too, and about a lot of other cities …)


the car vs. personal technology (quote of the week)

"Previous generations found freedom and flexibility through the car.  But Generation Ys find their freedom and flexibility by staying connected to their friends, family and workplaces through the various information devices – like their laptops, or iphones.

"They can stay connected on a bus or a train. They can bring the office with them. They can bring their study with them. They can bring their friends with them. They can't if they're driving."

— Peter Newman, Curtin University, Perth, Australia, quoted in the West Australian

Joshua Arbury of Auckland Transport Blog ruminates further.