Using BRT as a Transit Band-Aid
Sep 03, 2012
By Eric Jaffe
Read More: http://www.theatlanticcities.com/commute/2012/09/using-brt-transit-band-aid/3147/
When a new metro line opened up in Istanbul a couple weeks ago, it mostly served as a reminder of something the city has been awaiting for the better part of a decade. That would be the massive Marmaray project, a rail tunnel beneath the Bosphorous strait that will link the European and Asian sides of the intercontinental city. The delays have been reasonable — crews have had to deal with tricky geography, safety precautions required by a nearby fault line, and archeological discoveries made during the digging — but the initial phase is still a year from opening, and the full deal several more.
- The city wisely recognized that the immediacy of its traffic problem demanded some sort of short-term solution. Its response was to lay down, within a couple of years, a bus-rapid transit system known as the Metrobus. The 26-mile line operates in dedicated lanes along the D-100 expressway and connects both sides of the city across the Bosphorous Bridge. By most measures it's been a great success, according to a recent profile of the system in the Journal of Transport Geography.
- For starters, it's pretty fast. Except on the bridge, where it enters mixed traffic, Metrobus nears speeds of 50 miles an hour and completes its entire route in about 60 minutes. That's at least twice as fast as cars travel in the corridor, and also considerably faster than the previous bus and ferry system. It's also convenient: an estimated 10 percent of the entire metro population lives within a 10-minute walk of the nearest station.
- The frequency is almost ceaseless. High-capacity Mercedes buses, which can fit up to 200 passengers at a time, arrive every 30 seconds during rush hour on the European side (and every 45 seconds at the bridge crossing). During morning peak, ridership tops 30,000 each way, and the system as a whole serves more than 620,000 passengers a day. EMBARQ puts the total figure much higher. Still the bus is crowded; it's not unusual for waiting passengers to board the third bus they see.
- Istanbul isn't the first city to try BRT as a transit band-aid and realize what it really needed was a suture. Ottawa recently went through a similar experience with its own BRT system. The city proposed a (Canadian) $2.1 billion light rail to increase capacity — a project so expensive that transit writer Yonah Freemark wondered if it wouldn't have been more fiscally prudent to choose light rail from the start. "For other cities considering investing in reserved-bus corridors before light rail, Ottawa’s may be a cautionary tale," he wrote.
- Still, if Istanbul dismissed such a caution, it would be hard to fault the city. For starters, it didn't need BRT to prove the value of mass transit. Ottawa's BRT showed that transit could capture a quarter of the city's transportation share, but in Istanbul, that figure is now 50 percent, and was high even under the old system of slower buses. Meanwhile the city had already decided to invest heavily in the Marmaray project, which is estimated to cost up to (American) $3 billion.
- Rather, Istanbul's major concern moving forward should be getting people off its enormously congested roads. Public transit has half the city's transportation share, yes, but only 4 percent of that share belongs to rail. The completion of Marmaray, and its connection to the existing metro, light rail, and Metrobus lines, is expected to boost rail ridership closer to a quarter of all transit — that's a big cultural change. To date, only 9 percent of Metrobus riders have shifted to the mode from car use, as many as shifted there from trains.
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