Traffic was really heavy each way for me, especially in the afternoon. I put a side mirror on my bike to keep my eye on the traffic behind me, which made me SO much more comfortable having to get to the left turn lane, and to notice if some stupid driver wasn't paying attention and veering into the bike lane. (Never happened though.) You'll want to wear obnoxious colors that will ensure that you'll be seen from outer space. I'd recommed spending the $10 to get a mirror. If you must ride after the sun starts going down, get a red blinking light to put on your back so that traffic will see you, and some reflective tape is a good idea as well. If you can afford it, get a headlight for the front of your bike so you can see. (I have a "night rider," very nice but a little on the expensive side.)

The only problem I had when commuting was putting up with honking idiots and yells from guys who just had to mess with the chic on the bike. Shouts from passing cars can be startling, so just be aware. Don't answer people asking for directions, if they need directions they can stop at a gas station. Chances are they don't really need them anyway, they're just trying to hit on you or rattle you. Just keep going, don't give them the time of day. There are some really stupid people out there.

Good luck!!!!