Throw away you manual log book use iPhone to record you travel.

This Application allows a user to record and store details of any trip (time of the trip, starting point, end point, and distance traveled). Each trip can be then e-mailed to personal e-mail accounts for record keeping which is especially useful when collecting or claiming car (or truck) expenses from your tax. It can also measure distances traveled by walking and/or using bikes.
App is great for L and P Drivers for RTA log.