Yellowstone National Park has seen additional snowfall every day this week resulting in an increase in the snowpack on some of the interior roads in the park. Those improving conditions have allowed the park to open additional groomed road segments to motorized over-snow travel and to remove some restrictions on road segments which opened to travel on Monday. Spokesman Al Nash says commercial and non-commercially guided snowmobiles and commercial snow-coaches with rubber tracks or large over-snow tires may now travel all the way from Mammoth Hot Springs south through Norris to Madison, and from Norris east to Canyon Junction continuing south all the way to West Thumb. Snowmobiles and all types of snow-coaches may travel from the park’s South Entrance through West Thumb to Old Faithful. From West Yellowstone to Old Faithful, travel is still limited to snow-coaches with rubber tracks or large over-snow tires or other high clearance commercial wheeled vehicles. However, commercial operators have the option to trailer snowmobiles to Madison or Old Faithful to begin guided over-snow trips from those locations. The East Entrance is scheduled to open to over-snow travel Monday.