vale or san antonio districts, both of those areas had the highest rates of violent crime in the past five years. reporting live in oakland, cbs 5. >> a summer of traffic headaches in downtown sacramento has begun. crews got to work on some major central subway projects today. mike sugerman will show us how it will be worse before it gets better. >> welcome to san fransisco south of market district, be prepared to stay a while. actually be prepared to stop. >> it takes one hour to go approximately four city blocks and back to your destination. >> that and no parking, >> it is a headache all around. >> just tried to deliver beer around here. >> it puts him behind, and once you lose that time you never make it up. >> tony had 35 stops today and ran away from the start. >> in makes it difficult job more difficult. >> what is causing this summer of traffic is a hole in the ground. it is about to be able the ground. >> we're seeing preliminary work before get to the big dig, the exploration for natural subway tunnels. >> some of the tubes will be put in. i don't think that these are for the somewhere actually. these are small. it turns out that these are store lines. they're digging up the