track that keep people moving. >> it's made a difference in the way people go around. >> reporter: round-abouts, not to be confused with bigger intimidating rotaries on the east coast, are designed to smooth swoop drivers into any direction, slowly guide them around, and just as easy let them out and on their way. since cars don't stop, commuters save time and officials say use 30% less gas at intersections. >> a round-about can handle four to five times the amount of traffic in the same amount of time that a spotlight can have. >> reporter: and the mayor says that accidents are way down, improving insurance rates and the city saves money, too. >> we don't have to buy a $150,000 signal. we don't have to buy electricity. we don't have to replace it when all that equipment wears out. >> reporter: some drivers and pedestrians don't like round-abouts, but local