We require a flat file that contains mileage (route miles) between all US 5 digit zip codes, as well as 3 digit to 5 digit zips.
The problem is that we calculate that it will take us thousands of hours to run the calculations in MapPoint to generate the 5 x 5 table. We started using MapPoint, but I am open to any economical solution.
Ideally, does anyone know where we could purchase such a file that has already been created (for a reasonable amount - we were already sticker shocked by some large vendors).
Second best is a software tool that would allow help us accomplish this quick and easy that either works with OR without MapPoint.