I like several of the onramps onto 288, my favorite is comming off of Powhite Parkway onto 288. It is normally not busy and I almost always behave myself unless there is no traffic in front of me. There is very good visibility and it is a long fast sweeper.
This is the same onramp the Eurosports Porsche dealer took me when I was testdriving the 2006 Boxster S with 19" wheels (wishful thinking only). At the top of the onramp there is a concrete divider separating you from the main traffic flow for close to a mile and two lanes available for merging. Its a good place to see if you have tread squirm.
Ed
