I suggest you start with a list of similarities and differences.
What are the differences in road conditions between the two seasons? Do you need different tires on your automobile? What kind of driving skills do you need for the two seasons? What about avoiding roads you know will have bad driving conditions in the winter?
What things are the same? Should drivers have sunglasses in both seasons in order to be safe? What about the maintenance your automobile needs? Do you need the same engine lubricants (i.e. lighter oil in the winter, lighter in the summer; antifreeze, radiator maintenance, etc.)
Once you have your list of similarities and differences, you can begin to work on your outline, and then your first and subsequent rough drafts. When you have your content, I can help you will all of those steps.