Add some trucks for the Department of transportation [D.O.T] and some new gun models, perhaps ones of higher caliber[pun intended] that require premium or just free, as well as more modifications for the current guns, such as scopes, laser sights, grips, and also just more guns in general, something like an SMG, lmg, or minigun.
#Department of transportation and more items
opaque garnet
For DOT you can add a tow truck, maintenance van, car with a built in road sign, trailers for the van, new items such as jackhammers, speedbumps and more. Obviously they would need warning lights, no sounds but warning lights.