sample letter requesting for additional transportation allowance?

[dags]

my boss assigned me in the industrial area which is approximately triple the distance from my previous assignment which was in the showroom. This means i have to leave the house earlier and reach my home late as compared before plus the risk of traveling long distance and additional costs for my gasoline. can you please help me write a letter of request for additionl transportation allowance? my boss is such a difficult boss that's why i really need help to convince him to give me my request.