Finally got to check out the guide (WBEZ.org is blocked at work due to streaming media hogging bandwidth)...learned a couple new things. I remember when first moving to Chicago trying to decipher the traffic reports, but most of it gets fairly intuitive after a week or two of remembering where the major crossroads/exits being referenced are located.

Sarah Jindra is my favorite Chicago traffic reporter. Easy to follow and very thorough. She puts in some long days, too. She's on WBEZ around 5:30am and does the last traffic report there at 6:30pm.