Fairfax Supervisor Audrey Moore, launching the first broadcast advertisements of her campaign for county board chairman, blames Fairfax's traffic problems on its fast-paced development, linking two problems her opponent, Republican Chairman John F. Herrity, has tried to separate.

One of Moore's two 30-second radio commercials, scheduled to begin airing during this morning's rush hour, casts Moore, who has tried to slow the county's pace of growth, as someone "who knows how to balance development with our need for roads."

That spot, running on five radio stations, begins: "Here you are again. Sitting in traffic. Waiting . . . . Haven't you waited long enough?"

In the second radio advertisement, a woman's voice says, "This used to be a quiet neighborhood. Then they built an industrial park right next to where we live . . . . The politicians are all telling us how well they have handled new development. Well they've had their chance."

Tom Herrity, the chairman's son and campaign manager, criticized the ad, which was not based on a specific neighborhood. "I challenge {Moore} to tell me where this exists and what she would have done about it," he said. Moore strategists said the ad represented a typical problem in the county.

Neither radio commercial names Herrity, who is seeking his fourth term as chairman of the Board of Supervisors.

Jan Crawford, a consultant to Moore, said the initial radio spots, scheduled to run 70 times, cost $7,500. She would not say how much Moore planned to spend for the television ads, but she did say "we will be competitive" with Herrity. The Republican incumbent is expected to spend at least $200,000 for TV and radio time.

Herrity, in his campaign appearances, has tried to sever the link between traffic tie-ups, which he says he is best qualified to solve, and booming development, which he supports and credits with bringing prosperity and lower tax rates to Fairfax.

His first television commercial, which began running Sept. 16, promotes his record of supporting major road improvements, such as the construction of I-66 inside the Capital Beltway and the Dulles Toll Road.

As the campaign draws closer to the Nov. 3 election, Herrity is expected to hammer Moore for her votes against several major road projects.

In response to Moore's radio spots, Tom Herrity said: "Audrey Moore is trying to run away from her record with ads like this . . . . She is the one member of the board who has voted against major road improvements."