salary allowance

An allowance or advancement given by employer for business travel required by the employee for employment purpose of using your motor vehicle. For example for travelling from office to some other site for official purposes.

It is fully exempt or taxable or partly taxable?

Conveyance Allowance granted to meet the expenditure on conveyance in performance of duties of an office is exempt to the extent of expenditure incurred for official purposes. However, transport allowance granted to an employee to meet expenditure on commuting between place of residence and place of duty-Up to Rs. 1,600 per month (Rs. 3,200 per month for blind, deaf, dumb and handicapped employees) is exempt.

but travel allowance is different from transport allowance