THIRUVANANTHAPURAM: Public Works Minister P A Mohamed Riyas has time and again blamed the National Highways Authority of India (NHAI) over potholes on NHs in the state. Amid all this, the role of his department’s NH wing, tasked with the maintenance of 548km of NHs in the state, remains unclear. The government has been spending crores of rupees to pay the salaries of the wing’s employees — all 902 of them. This fiscal, `62.70 crore has been set aside for the purpose.