If you are concerned about being stuck without a car, use car-sharing through companies such as Flexcar, which has over 200 cars throughout the Portland area and plans starting at $9/hr. Ask your work about incentives for alternatives to driving including telecommuting part-time there are tax benefits for businesses and there may be benefits for you in addition to saving gas money. A new car company Go Loco, incorporates social networking with online payments for a carshare program without the hassle.