They also plan to reduce the mileage rate paid to the employees, such as social workers, planning officials, animal health inspectors, mobile caretakers, admin assistants and school support officers, who use their own cars to perform their duties.
Now members of the Unison and GMB unions have voted in a ballot to take industrial action in protest at the controversial proposals, which were first revealed more than a year ago.
The ballot revealed 70% support for strike action and 80% backing for action short of a strike – which could include staff withdrawing the use of their cars for work purposes.
The unions are now waiting for a response from council bosses before consulting members on when, and in what form, action should be taken.
It was revealed in January last year that the council wanted to save £700,000 by taking away the allowances and cutting mileage payments for about 750 employees. Unions say the number of staff affected by the proposal has fallen to between 400 and 500 now.