RED LINE/Yuppie Express

Metro's Red Line extension expanded twice in 1984, first to Grosvenor and then to Shady Grove. Dubbed the Yuppie Express for the affluent neighborhoods it serves in Northwest D.C. and Montgomery County, the seven-mile, $278 million extension was delayed a year because of a shortage of rail cars. And it would have been delayed even longer if it weren't for the slick politicking of some Montgomery County officials, particularly the county's representative on the Metro board, Cleatus Barnett. PARRIS N. GLENDENING/Money Man

The Prince George's County executive wangled a transfer tax increase out of the legislature, although everyone said he didn't have a chance. He also backed -- successfully -- the amendment of TRIM, the voter-mandated limit on property tax revenues, which, he argued, had hurt the county's image and pocketbook. CHESAPEAKE BAY/Boost for Bay

America's largest estuary, which had fallen on hard times, received a boost in funds from the Maryland legislature, Congress and the Reagan administration to clean up its polluted waters. Under attack from environmentalists, President Reagan seized on the bay as a symbol of his commitment, singling it out for funding in his State of the Union address and paying a much publicized visit to Tilghman Island. FRANK J. DeFRANCIS/Racing Ahead

He may look like he's a refugee from central casting, but in 11 months as Maryland's secretary of Economic and Community Development, DeFrancis earned a great deal of respect as an aggressive promoter for a state some regarded as hostile to business. Already the owner of a harness track, DeFrancis left state government to buy the thoroughbred racing facility at Laurel, instantly making him the most important man in the state's racing industry. Worth watching as the state wrestles with ways to salvage thoroughbred racing. ART DECO/Agreement Reached

Preservationists won their fight to save some of the Art Deco look of the old Silver Spring shopping district at Colesville Road and Georgia Avenue. Just weeks after sniping at each other, the preservationists and developers agreed on plans for two huge projects entailing both restoration and new construction that would incorporate the chic look of the 1930s and 1940s. HOMEOWNERS/Montgomery Tax Rate Down

In Montgomery County, the property tax rate went down 16 cents per $100 of assessed value. In some of the older suburbs, where assessments jumped the least, that meant a tax decrease for the first time in years. Elsewhere, it meant a lower tax increase than otherwise. ROCKFISH/Temporary Reprieve

The Chesapeake Bay's premier fin fish, called striped bass elsewhere along the East Coast, won a temporary reprieve from the nets of Maryland watermen when the state decided to ban rockfish catching in Maryland waters. The moratorium, an effort to build up the supply of what has been called "the aquatic equivalent of the American bald eagle," will last a minimum of four years, after which the real winners will be lovers of the delicately flavored fish. HARDIE CLIFTON/A New Heart

The 50-year-old professional gospel singer couldn't afford a $30,000 hospital down payment for a heart transplant. After White House intervention, Maryland agreed to bend its Medicaid rules to pay half the tab with the federal government paying the rest. Clifton received his new heart in September and went home in November. Despite signs that his system is rejecting the new organ, causing him to spend the holidays in the hospital, the transplant operation has given the man from White Oak a new lease on life. EDWARD J. FEENEY/Good Grades

Feeney managed to retire -- voluntarily -- from his long held post as Prince George's County school superintendent. With revolving doors the rule rather than the exception in other area systems, and many superintendents being shown the door, the universal accolades accorded Feeney on his departure makes him unusual. BONNIE F. JOHNS/The Conscience

Johns served seven years on the Prince George's school board, the last as chairman. One of two blacks on the board overseeing a school system with an enrollment now more than 50 percent black, her concerns include busing and court-ordered desegregation. As board chairman, she had to publicly defend policies she had privately fought. For her battles within the system, Johns was widely regarded as "the conscience" of the panel.