That stretch has a rival in Houston: if you're heading towards downtown on Allen Parkway and get onto I-45 northbound, the entrance ramp is a tight upward spir

That stretch has a rival in Houston: if you're heading towards downtown on Allen Parkway and get onto I-45 northbound, the entrance ramp is a tight upward spiral and you'll need to accelerate from 30 to 70 lickety-split because it dumps you right into a full-fledged interstate lane, not a merge lane!