The .dat file specifying the graphics for the Volvo police car has an error, specifying the image files as ...2.x rather than ...0.x. Attached below is a corrected .dat file:
obj=citycar
name=Volvo-V70-Police
copyright=JamesHood&Volvo
DistributionWeight=2
intro_year=1990
#retire_year=2030
speed=130
EmptyImage[E]=volvo-v70-police.0.0
EmptyImage[SE]=volvo-v70-police.0.1
EmptyImage[S]=volvo-v70-police.0.2
EmptyImage[SW]=volvo-v70-police.0.3
EmptyImage[W]=volvo-v70-police.0.4
EmptyImage[NW]=volvo-v70-police.0.5
EmptyImage[N]=volvo-v70-police.0.6
EmptyImage[NE]=volvo-v70-police.0.7
Edit: Although, even with the image paths corrected, I still get an error when compiling this one.