Snow Lane Mile. A “Snow Lane Mile” is a travel lane that is up to twelve (12) feet wide and one (1) lineal mile long. Where travel lanes are wider than twelve (12) feet, additional lane miles shall be computed and reflected on Exhibit “A” pursuant to then- existing PennDOT policy, which at present is articulated in Chapter 4 of the PennDOT Maintenance Manual, Publication 23, which is available on PennDOT’s publicly accessible website.