Difference between travelling & conveyance allowance

travelling allowance means allowance given to the employee to reach office from his house. This is exempt at Rs.800 per month. 

Conveyance is something like a reimbursement. If the employee has to move around a lot and incurrs cost towards petrol, toll, parking, refreshments etc and the same is reimbursed by the company in a fixed or on basis of as you incurr, then to the extent the bills are produced conveyance would be exempt.