The following were among actions taken by the Fairfax County Board of Supervisors at its Nov. 30 meeting. For more information, call 246-3187.

RTE. 28 TAX DISTRICT -- The board deferred action on creating a special tax district around Rte. 28 on the Fairfax-Loudoun county border, where landowners would be taxed to help pay for up to $392 million of road improvements in the area.

Many speakers at a public hearing on the plan told horror stories of delays and traffic jams on the roadway, and urged the board to adopt the tax district resolution. A spokesman for British Aerospace Inc., which has offices in the area, said traffic had forced the firm to adopt a system of flexible work hours for its employes, which has made it difficult to communicate with customers and the firm's British home office.

Board members decided to defer acting on the plan until Dec. 7, because they wanted to get additional support from developers and landowners, who might have to pay up to 20 cents per $100 of assessed value under the plan. The Loudoun County Board of Supervisors, which also must also approve the plan for it to go into effect, is expected to vote on the tax district Dec. 7.

UTILITY INSPECTORS -- Alarmed by increasing job turnover among the county's public utility inspectors and complaints about defects in new building projects, the supervisors unanimously approved staff increases and approved new measures to retain employes.

Department of Environmental Management Inspectors investigate complaints about building construction defects. According to a report by County Executive J. Hamilton Lambert, such complaints have increased by 77.7 percent, from 2,270 to 4,006, since 1985, and are expected to increase another 50 percent in fiscal 1988. But no staff positions have been added since 1985, the report said. Staff turnover has also increased from 13.7 percent a year in fiscal 1984 to 37.9 percent this fiscal year.

The new measure would add 15 workers to an existing code enforcement staff of eight, put air conditioners in inspectors' cars, and produce a videotape to help train them. The cost of the measures will be about $400,000 a year, most of which is expected to come from fees for inspections and permits.

VOTING BOOTHS -- The board voted 5 to 0 to obtain 584 electronic voting machines, which officials hope can replace the county's aging mechanical machines in time for the March 8 presidential primary.

The board's action followed complaints about broken voting machines and delayed returns in last month's elections. The new machines can count votes within eight minutes of the polls' closing, according to a spokesman for their manufacturer. The new machines will cost about $2.7 million, and will be leased and purchased over a five-year period.