(driver sought review of citation given for driving on public highway while using special dyed (nontaxed) fuel; driver argued his International Harvester truck was an off-road vehicle based on modifications and its current design and use; court agreed current use of truck was for transportation of people or property on public roads; court also found significant that driver was not using his vehicle for the allowed purpose at the time of citation as he admitted he was moving supplies from one location of his farm to another).