I can't be sure, but I believe ASPmap[1] might be able to do calculations such as this, if you have a GIS shape file of the roads in question. [1] http://www.vdstech.com/aspmap.htm Matt On Tue, 22 Aug 2006 09:49:07 -0400, Rob Smith <rob.smith at lexjet.com> wrote: > Now I ask about other options? Does anyone know of any third-party zip > code to zip code route calculators that factor in roads? -- Matt Bernhardt, bernhardt.7 at osu.edu Webmaster + Fab Lab Coordinator Knowlton School of Architecture The Ohio State University