This took me several attempts and was quite frustrating at first (not more frustrating than the nines not being there at all because of the 2nd time around saved game glitch though!).

What i found was the best place to take out the nines is not the road right by the telephone. If the telephone is on your right then head down the road until the road turns to the right and then just keep driving up and down this stretch (after the turn).

I found there were way more nines around and also fewer vehicles seem to bother me. Try it out and see what you think *