The performance of NHAI can be rated as 4+ in 5+ rating. Recently I toured Kerala by road and I realised that some thing good has been done in the improvement of National highways in south. Chennai-Trichy-Madurai,Chennai-Bangalore are really nice to travel.The delay in toll booths and the toll rates(which can be rationalised) are negative points to be mentioned..In some segments the maintenance is poor .Overspeeding of State owned and private buses (omni buses) should be checked and regularised to avoid fatal road accidents. Highway patrolling during night should be strengthened and make sure to get immediate medical attention for accident victims in highways