Can't believe I forgot this one!!!
I90 Eastbound
Starting from Downtown (hell, starting from W.25th on 71N), once yo go through Dead Man's Curve, it's full throttle down 4 lanes of highway until you come up to E.140th.
I just went down it yesterday after work to check for places where the 5-0 could hide out. Really isn't anywhere except helicopter, and the city doesn't use helicopters for traffic patrol. From downtown to E.140th is a good couple of miles. Most pedestrian traffic takes the middle two lanes which leaves the outer lanes for cruising down. Coming out of downtown, you'll get some nice high-speed curves as well.