Muir Woods National Monument will implement a reservation system Jan. 16 for parking and shuttle service to reduce congestion in the Marin County preserve, the National Park Service said.

All vehicles will have to use the reservation system to secure one of the 232 parking spaces at Muir Woods. The system, which will allow visitors to make reservations up to 90 days in advance, will go live on Jan. 1.

A parking space can be reserved for $8, and a seat on a shuttle for those 16 and older for $3. Both provide a timed arrival, and neither imposes a restriction on the length of stay for the day, officials said.

People who arrive at Muir Woods on bicycles will not have to pay the fee.

The reservation system is a move to mitigate safety risks that have come with recent crowding, officials said. Limited parking space and increasing numbers of visitors have led to more foot traffic on narrow roads, officials said, as well as illegal parking.

Ace Parking Management Inc. will manage the reservation system, officials said. The system will be year-round, and reservations can be made either through a website or through a call center.

Commercial carriers will also be required to make reservations through a separate system, expected to be available in late spring. Officials said visitors coming in on a commercial carrier will not be subject to the vehicle and shuttle reservation system.

The move is expected to cut the number of annual visitors to less than 1 million, down from an estimated 1.2 million currently.

For more information, go to the National Park Service’s Muir Woods website, http://bit.ly/2wHVaf9.

Annie Ma is a San Francisco Chronicle staff writer. Email: ama@sfchronicle.com Twitter: @anniema15