Specifications include, but are not limited to: Pavement Preservation project to mill and fill full width the I-90 eastbound and westbound lanes, interchange ramps, crossroads at the Gregson Interchange, Ramsay Interchange and Nissler Junction to a depth of 0.20ft. and replaced with 0.20 ft. plant mix surfacing. This project will also include a seal and cover, bridge work, MASH compliant guardrail, rumble strips, new cattleguards, pavement markings and updated signing. The project is located 4.2 miles west of Butte on I-90. The project begins west of the Fairmont Interchange (RP 211.5) and proceeds 8.5 miles east to the Nissler Interchange (219.2). HSIP STWD (657) - Nissler Interchange - NB to WB loop ramp (121.6 to 121.95): replace existing speed advisory sign with solar powered radar speed feedback sign, install linear delineation on barrier in curve. WB to SB ramp: install chevrons and shoulder rumble strips through curve.
