Lois Ave in South Tampa. It's only 2.25 miles, and I call it "the gauntlet". The first mile is in the business district, four lanes, 35 MPH speed limit, but cars pulling out of office buildings and side streets every few seconds. Then you go under the inter-state and it narrows to 2 lanes (with curbs, and VERY narrow lanes) for 1.25 miles. At this point it is residential and the speed limit drops to 30, but it is a major connector from the business district to the South Tampa area. There are three traffic lights in that 1.25 mile stretch, the cars are bumper to bumper and desperate to get to/from work, and I am in their way. So I sprint for all I'm worth and red line my heart rate for that 1.25 miles each morning and evening. Some days, I can keep the car in front of me in sight for the entire 1.25 miles. Then I turn onto a four lane road and relax for the other 12 miles of my ride, which is very nice.