Federal #6. Full choke.
Yes you can hunt along side roads. Better to get permission from a farmer to hunt in the stubble though.
Some pheasants run, but mostly they'll fly. Grouse is the bird that has more runners than flyers now.
Hunting without a dog means a lot more work on your part. Look for clumps of weed or grass that might hide a pheasant, walk up to it and if they're there a bird will pop up when you're about 5 yards away, give or take. You might find birds right at your feet.