racing on public roads it a bad idea.
didn't think that 10 years ago but i've been in and seen enough to be extremely cautious. sure, you may be confident in your driving skills but you can't depend on nearby drivers being the same or even noticing you zip through lane changes.
for example, i was driving home from roseville to san mateo on mother's day. i was stuck in traffic most of the way but there was a stretch of open road on 80 near richmond. so i speed up to about 75-80. that's when i notice a slightly tricked sentra trying to keep up. as i'm cruising i notice in my rear view Mirror
the same car swerving back and forth in all the lanes, hitting the center divider 2 times and missing a few cars. then a full size truck zooms past me at about 90+. i assume the truck clipped the sentra or caused the driver to lock the brakes.
long story short, you can't always anticipate those around you. so, be careful and keep the reckless driving to a minimum.