The inaugural committee has arranged a limited free shuttle service from the three local airports and Union Station starting Tuesday.

One bus will leave each terminal every half hour starting at 2 p.m. Tuesday and running unitil 9 p.m. On Wednesday, The service starts at 9 a.m. and runs until 9 p.m., and on Thursday will go from 9 a.m. to 11 a.m. The buses will stop at 21 different hotels downtown and in Arlington. Return service from these hotels to the airports runs from 5 p.m. to 9 p.m. Thursday only.

Buses will also leave each of the 21 hotels every five minutes between 7 p.m. to 3 a.m. Thursday evening to take party-goers to the inaugural parties. Tickets are required for these parties and none are now available.

The 21 hotels covered by the shuttle service are: Airport Hotel (Arlington), Burlington Hotel, Sheraton-Carlton Hotel, Executive House. Hay-Adams Hotel, Capital Hilton Hotel (formerly Statler Hilton), Washington Hilton, Madison Hotel, Mayflower Hotel, Sheraton Park, Loews L'Enfant Plaza, Hyatt Regency, Dupont Plaza, Americana, Marriott-Twin Bridges, Mariott-Kev Bridge, Marriott-Crystal City, Shoreham, National Airport Holiday Inn, Holiday Inn at 1501 Rhode Island Ave. NW., and the Howard Johnson Motor Lodge on Jefferson Davis Highway in Arlington.

Tourmobiles will be giving free tours independent of the inaugural committee. The committee is sponsoring several other tours including one of "the other Washington," that goes to the Southwest urban renewal area, Anacostia, the Frederick Douglass home and Gallaudet College for the deaf.

Another tour will cover Embassy Row, Anderson House. Washington National Cathedral, the inner city and Howard University.

A walking tour of Pennsylvania Avenue will start on the terrace of the U.S. Treasury Building near 15th Street at 2 p.m. on Wednesday.

The Metro subway will stay open until 9 p.m., an hour later than usual, on Tuesday, Wednesday and Thursday, and service will be free of charge between noon and 2 p.m. on Thursday, Regular Metrobus routes will operate on a Saturday schedule on Inauguration Day.

Also on Inauguration Day, the committee will operate a free bus shuttle service, picking up persons from several locations throughout the Washington area. The Post will publish a complete listing of those routes in its Wednesday and Thursday editions next week.