Going n orthbound on I-80, cops are usually at the American Canyon on-ramp or Red Top on-ramp. Last Saturday, I saw 2 guys pulled over at the same time @ Red Top - downhill into Cordelia... There like 4 cops at 1 time...

 

I also use a radar detector, right now I have the Passport 8500 X50, and I have been save more times than I care to count. Bruce is right about the jammers too. I have a Phazer II that jams all radar and laser, but won't use it, as they know it and it only took me one scary time to learn not to use it, and that was in SJ too.