The roads and highway ministry is planning to introduce automatic tolling system on all national highways by the second half of 2006. Highly-placed sources in the ministry said the ongoing manual tolling system would be replaced by a computerised system. Commuters would be issued encrypted prepaid smart cards from which a specific amount would be deducted while passing through toll plazas. As a pilot project, these automated toll plazas would be set up on 14 stretches of the Delhi-Mumbai highway. These include stretches like Delhi-Jaipur, Delhi-Agra and Panipat-Jalandha, leading upto Mumbai.