1. (a) Highway projects constructed with state highway aid shall be designed in accordance with the following design standards and manuals:

   1. (1) AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, 6th Edition (2013) and interim revisions;
   2. (2) AASHTO Policy on Geometric Design of Highways and Streets (2011, 6th Edition);
   3. (3) Federal Highway Administration Manual on Uniform Traffic Control Devices, as adopted by the commissioner as a policy for traffic control standards (2009 and subsequent revisions);
   4. (4) AASHTO Roadside Design Guide, 4thEdition (2011);
   5. (5) New Hampshire Department of Transportation (NHDOT) Standard Specifications for Road and Bridge Construction, 2010Edition; and
   6. (6) New Hampshire Department of Transportation (NHDOT) Highway Design Manual (1999).

2. (b) Upon written application of a municipality, the department shall waive any of the minimum design standards relating to municipal highways affected by the project:

   1. (1) Unless it determines that the requested waiver, if granted, would result in an imminent or substantial threat to human health, public safety, or the environment; and
   2. (2) If the municipality has accepted, in writing, responsibility for construction that does not meet the waived minimum design standards.

Source. #8924, eff 6-27-07; ss by #11037, eff 2-22-16