Simple or not, but needful improvement. Now it seems like in the future there will be more alternative fuel cars: hybrid or even steam and wood gasifier, compressed air maybe. Gasoline only will be rare.
And also I was wondering why theres no broken windows, no blood strains everywhere zombies are? Did they all turn to zombies so peacefully?
In addition there could be places still untouched, with no zeds. And it should alert the player even more! Because there`s probably something more scary than zeds!
Important! So it is possible to make retroactive processes for NPC? Then we must have this for fires! When you ignite a building, go somewhere for week and return - it continues its burning from the point you left it. And overloads computer. How about simplifying burning so that you leave it for some time, come back, and everything that could burn is burned? Or extinguished if rains nearby.