Jarrett Walker’s Human Transit and Peninsula Transit dilemmas

Jarrett Walker's Human TransitRecently I read Jarrett Walker’s excellent new book Human Transit, which encapsulates the ideas that Walker shares on his transit planning blog. The book clearly frames the decisions that shape public transit systems, as well as some of the common misconceptions that mis-shape public transit.

The book sheds light on some of the dilemmas that afflict the transit system in our area, which doesn’t work much like a system.

1) Frequency is Freedom. When the media describes Caltrain electrification, they often describe the benefit as “faster service.” They leave out improved frequency to more stations. Jarrett Walker explains that media – and decision-makers – who are more familiar with automobiles often over-estimate the benefit of travel speed for transit systems. When you drive a car and can leave any time, the improvement that means the most to you is greater speed. But if you take transit that comes once an hour, the biggest improvement you need is greater frequency.

Speed isn’t irrelevant. When Caltrain added the “Baby Bullet” that made the train more competitive with driving, ridership went up overall. In San Francisco, Muni’s big problem really is speed – Muni travels an average of 8mph, slower than an ordinary bicyclist.

When people tout the benefits of BART, they describe it as “convenient” or even “fast”. But the BART trains aren’t particularly speedy – they are frequent. They arrive every 5-20 minutes, depending on the station and time of day. A rider can take the train with little or no advanced planning, and use transit most of the time.

Walker has popularized Frequent Network maps that highlight, for riders and agencies, which parts of the transit network offer frequent service, and therefore useful service.

Vancouver Frequent Network Map

Vancouver’s transit map is an excellent example of a Frequent Network Map, which highlights the most frequent (and therefore, useful) bus lines.


2) Ridership or coverage? The way that Walker frames this dilemma sheds light on the perennial problems of Caltrain and SamTrans.

Walker explains that a transit service needs to decide how to balance goals for ridership, and for coverage. To optimize for ridership, a service identifies where large numbers of people start and where they go, and designs routes that connects most people with their destinations. To optimize for coverage, a transit service attempts to serve as much of the geographic area, as possible, and to space stops as close together as possible.

Optimizing for a coverage goal can provide service to people who have no other travel choices. But the resulting service will be very slow and roundabout, uncompetitive for people who have other choices, and a burden for people whose time could be used with family or work.

Optimizing for ridership will have the best direct financial return (serving the most passengers per service/hour). Where there is high peak use, a plan to optimize ridership might provide service only at the height of rush hour. This type of service doesn’t address equity goals. It also may not maximize the larger economic benefits of transit, where people choose to live and work, and locate their businesses in areas with convenient transit.

With the Baby Bullet and its peak-centric service, Caltrain is oriented more toward a “ridership” goal.

With its service for schoolkids, elderly riders, and frequent stops in urban locations, and service to suburban locations, SamTrans is oriented toward a “coverage” goal. But since it is hemorrhaging cash, and expected to be bankrupt in 2015, this goal is clearly unsustainable.

What is the most frustrating is that Caltrain and SamTrans are not seen as parts of a single transit system helping riders get from point A to point B. Instead, they are seen as high end and low end products in a product line – a Cadillac and a Geo Metro.

Which raises another issue:

3) Connections or Complexity. Conventional wisdom holds that “riders won’t transfer”, and therefore transit services are designed to have convoluted and inefficient routes, which are not time-efficient for riders or cost-efficient for agencies.

Actually, experience around the world shows that riders will transfer if the schedule and stations are designed properly. IF – you can walk across a platform onto a waiting train or bus, and quickly head toward your destination, if you can transfer without financial penalty, if you can easily find directions from Point A to Point B without hunting among multiple maps and websites – then a transfer is pretty painless and a trip can be useful. A system designed with a grid is more efficient at getting people from origin to destination than a system.

Unfortunately, because of the Bay Area’s fragmented transit system, we often do not have good transfers. Connect time isn’t optimized, and riders need to pay a premium because they are using different brands.

Portland Transit Map

Portland’s transit system is optimized to reduce the time required to transfer between lines, and doesn’t charge an extra fare for transfers.

The MTC’s Transit Sustainability Project, designed to analyze and improve the efficiency of Bay Area transit, looks only at the point-to-point efficiency of individual major lines. The effectiveness of feeder service to support the first and last miles to and from the trunk service is not considered. It’s like looking at the arteries and veins of a circulation system without the capillaries that feed digits and organs.

In order to improve the connectivity of the system, the Bay Area doesn’t need to consolidate into One Big Transit Agency. There are several metro areas in Europe that have many cities, similar to the Bay Area. They have different local agencies, but a single coordinating agency that consolidates fares, schedules, and marketing across all of the agencies.

Walker doesn’t have pre-packaged answers for every transit problem. Instead, he lays out clear principles of transit system design that can be used to help jurisdictions make better decisions.

I highly recommend the book to anyone who is concerned about the ways that our transit system underperforms, and ways to make improvements.

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