I have never had a bad experience in L. A., either from driving or being a pedestrian...But then, I am from Houston so i am used to automobile oriented communities.
Portland has purposely made it difficult to use your car...the buzz phrase used to be, "Get Americans out of their cars." They cancel, delay or downsize traffic /roadway projects. The idea is to persuade you to use the Metro system.
Even better, ride your bike. There are bike lanes all over the city and well into the burbs.
TriMet is a public agency that operates mass transit in the Portland metropolitan area. TriMet started operating a light rail system, the MAX in 1986, which has since been expanded to 5 lines that now cover 59.7 miles, as well as a commuter rail line in 2009. It also provides the operators and maintenance personnel for the City of Portland-owned Portland Streetcar system.
There are 683 buses in TriMet's fleet. In Fiscal Year 2013, the entire system averaged almost 316,700 rides per weekday and operates buses and trains between 5 a.m. and 2 a.m. with no "night owl" service. TriMet's annual budget is $489 million, with over half of revenues coming from a district-wide payroll tax.