Transportation

Flight delays cost more than just time

11/04/10 — Domestic flight delays put a $32.9 billion dent in the U.S. economy, and about half that cost is borne by airline passengers, according to a study led by UC Berkeley researchers and released last month. The comprehensive report analyzed flight delay data from 2007 to calculate the economic impact on both airlines and passengers, including the cost of lost demand and the collective impact of these costs on the U.S. economy. The report was commissioned by the Federal Aviation Administration to clarify key discrepancies in earlier studies.

Flight delays cost you $17B, cost U.S. $33B, UC Berkeley study shows

10/18/10 San Francisco Business Times — A study from UC Berkeley's Institute of Transportation Studies crunched numbers from 2007 for the Federal Aviation Administration for a report showing that domestic airline flight delays cost the U.S. economy some $32.9 billion a year, and passengers pay half that cost, or about $16.7 billion. Civil engineering professor Mark Hansen, lead researcher on the study, said it was the first time anyone had analyzed data this way, coming up with a direct cost.

The inconvenient truth about traffic math: Progress is slow

08/28/10 The Wall Street Journal — This month's 60-mile traffic jam in China has demonstrated a frustrating truth about traffic: It is far easier to measure than mitigate. Mathematicians, engineers and planners are making steady advances in assessing traffic congestion and explaining it, but traffic math's strides in reducing congestion are modest, simply because the number of cars often exceeds roadway capacity. If population and the economy keep growing, "there is absolutely no way congestion can stop increasing," says Alex Bayen, an associate professor of systems engineering at UC Berkeley.

Despite glitches, electronics make cars safer

02/11/10 National Public Radio — Do all the fancy electronics cars need to squeeze 40 or 50 miles out of a gallon of gas mean we've compromised on safety? "Absolutely not," says Simon Washington, director of the Safe Transportation Research and Education Center at the University of California, Berkeley. He says that when carmakers are faced with a trade-off between safety and fuel economy, safety typically wins.

A Reality Check on High-Speed Rail for California

11/13/09 — In November 2008, California voters passed a $9.95-billion bond issue to build a bullet train that would zip passengers between San Francisco and Los Angeles via the Central Valley at speeds up to 220 miles per hour. A few months later, the Obama administration threw its heft behind the high-speed rail concept by offering nearly $10 billion to HSR projects. Clearly, many Americans are smitten with the romance of the rails. But last month, at an overflow symposium at UC Berkeley, a panel of experts in the fields of transportation engineering and city and regional planning urged caution.

A Sea Change for Wind Farms

11/13/09 — Twenty miles out to sea, far from seabirds and boat traffic, a 300-foot wind turbine spins in the breeze. It's not alone. Thirty wind turbines are generating electricity in something called an offshore wind farm. Each turbine is integrated into a highly advanced floating platform and tethered by thick chains to the sea floor. Electricity flows into a giant undersea cable that extends toward shore. At 200 megawatts, this floating farm of clean energy powers more than 60,000 homes. It's still a futuristic vision, but ocean engineers and entrepreneurs Dominique Roddier (Ph.D'00 Naval Architecture) and Christian Cermelli (M.S'90, Ph.D'95 Naval Architecture) are one step closer to bringing their unique solution, WindFloat, to life.

One of BART’s Biggest Fans

09/04/09 — Barney Smits (B.S.'92 ME) rides Bay Area Rapid Transit every weekday from his Oakland home to his office, two blocks from Oakland's 19th St. station. "I take it just about everywhere I can," he says. "To the opera in the city, to the airport when I'm traveling. Once you're used to it, it's the absolute best, easiest way of getting around." But then he might be biased. Smits, 53, is the transit system's principal mechanical engineer, a job he's held for several years. He's one of the guys who makes sure that the 20 miles of tunnel and 208 miles of track and all the stations and system facilities are safe for riders like him, and you.

Greening GM

10/02/08 — In the fall of 1975, a young General Motors engineer named Larry Burns loaded up his customized Chevy and headed to Berkeley. The Michigan native came west for doctoral studies in transportation engineering. “It's an area that has served me quite well,” he says. Today, Burns is in charge of next-generation cars and other leading-edge technology for the world's largest automaker. “I wake up every day focused on reinventing the automobile,” he says. A 2007 New York Times article called him “the most visible executive at the American auto companies on green issues.”

Road Test

03/02/08 — UC Berkeley just conducted an unprecedented collaborative experiment involving 100 cars equipped with GPS-enabled cell phones to monitor real-time traffic flow over a seven-hour period on a 10-mile stretch of I-880. You can read more details about the project and its success in Abby Cohn's delightful story in this month's issue.

Dial “T” for Traffic

03/02/08 — On February 8, 26-year-old mechanical engineering student Kenneth Armijo hit the road in a unique experiment exploring the use of GPS-equipped cell phones as traffic monitors. Nearly 150 UC Berkeley students were behind-the-wheel participants in the “Mobile Century” test. Navigating a fleet of 100 cars carrying special mobile phones, the student drivers traveled up and down a 10-mile stretch of the Nimitz Freeway for more than seven hours. The result was a computerized map bristling with tiny flags for each car and its velocity, creating a detailed picture of actual traffic conditions.