MACAU'S streets could be almost empty today if a threatened suspension of services by local transport groups goes ahead. Last night eight Macau transport associations, including taxi drivers, crane operators and lorry drivers, were threatening to stay off the roads in protest against a new set of highway laws imposed by the Government. They said the laws, which included increasing fines for vehicles driving without headlights after dark and for parking on yellow lines, were ''inappropriate'' for Macau and should be changed. Taxi drivers were also annoyed at a new rule which stipulates they must hold a driving licence for at least five years before they can operate a taxi. Although the legislation was introduced on June 1, the police spent a month giving warnings to offenders, bringing the fine system into operation in July. Representatives of the eight groups met Dr Jorge Barras, legal adviser to the Under-Secretary for Transport and Public Works, yesterday afternoon asking that the Government listen to public opinion and revise the laws to meet local needs. However, at 6 pm yesterday they reported a deadlock in negotiations and announced that services would be suspended at midnight. Spokesman for the associations Yip Siu-cheong said: ''This is not a strike. ''We are just stopping our services to protest about the Government's lack of sincerity in its negotiations.''