Generally revise the route of the Lewis and Clark Highway

This bill updates the official route of Montana's Lewis and Clark Highway by amending state law to specify its path through the state. The legislation primarily affects the Montana Department of Transportation and local communities along the highway corridor, particularly in Missoula. A key provision requires the highway to avoid running between South Higgins Avenue and Arthur Avenue north of 6th South Street in Missoula, instead mandating that officials consult with Missoula County and the city to find an alternate route that minimizes travel through residential neighborhoods. The rest of the highway route remains unchanged, continuing from the Idaho border through Lolo, Missoula, Garrison, and ending at the North Dakota state line.