Dress-up in light gray clothing - sweatshirt and sweat pants.
Get white tape and tape it down the front of you in one strip or small pieces (as in road lines). Buy a package of small cars/trucks and super glue them to the front of your sweatshirt/pants, some in one direction some going the other.
Make a head band with a sign of a local highway attached to the top of it! Cover your carrying bag in road home-made signs!
Thank to Rachel in Toronto for the great idea!
