சென்னை டூ சேலம் அதிவிரைவு சாலை.. திருவண்ணாமலை வரை அமைவது ஏன்.. அரசின் பிளான் என்ன?

The state government has decided to construct a shortened expressway between Chennai and Tiruvannamalai instead of the Chennai-Salem Expressway. This will reduce the travel time from 4 hours to 2 hours. Why is the Chennai to Salem Expressway extending to Tiruvannamalai? What is the governments plan?