(1)   The following minimum geometric design standards are established for improvements on town roads: – See PDF for table PDF
      (a)    Local service, intermittent traffic
         1.    Right-of-way   3 rods
         2.    Roadway width   20 feet
         3.    Surface width   16 feet
      (b)    Under 100 ADT
         1.    Right-of-way   3 rods
         2.    Roadway width   24 feet
         3.    Surface width   18 feet
         4.    Maximum grades   9%-11%
      (c)    100 to 250 ADT
         1.    Right-of-way   4 rods
         2.    Roadway width   26 feet
         3.    Surface width   20 feet
         4.    Maximum grades   8%-11%
      (d)    251 to 400 ADT
         1.    Right-of-way   4 rods
         2.    Roadway width   32 feet
         3.    Surface width   22 feet
         4.    Maximum grades   6%-8%
         5.    Curvature   6°-12.5°
      (e)    401 to 1,000 ADT
         1.    Right-of-way   4 rods
         2.    Roadway width   34 feet
         3.    Surface width   22 feet
         4.    Maximum grades   5%-8%
         5.    Curvature   5°-12.5°
      (f)    1,001 to 2,400 ADT
         1.    Right-of-way   4 rods
         2.    Roadway width   44 feet
         3.    Surface width   24 feet
         4.    Maximum grades   5%-7%
         5.    Curvature   4.5°-7.5°
      (g)    Over 2,400     State trunk standards
   (2)   The department may approve deviations from the minimum standards in special cases where the strict application of the standards is impractical and where such deviation is not contrary to the public interest and safety and the intent of this section.
   (3)   This section does not apply to improvements on town roads existing on October 1, 1992.