As the busy summer tourist season kicks off, Marin County and the National Park Service have eliminated 80 parking spaces and increased enforcement along Muir Woods Road as part of a plan to manage waves of visitors to Muir Woods National Monument. The parking efforts precede the implementation of a parking reservation system by fall of 2017 for Muir Woods, which hosts from 5,000 to 6,500 visitors during peak summer days and 1 million visitors…