THIRUVANANTHAPURAM: Putting up streetlights on the median of Kazhakoottam -Vizhinjam NH bypass, which had remained a sticking point between the corporation and National Highways Authority of India, has been resolved with the two sides agreeing on the Public- Private- Participation (PPP) model for facilitating the same. The civic body will submit a Detailed Project report (DPR) to the NHAI in mid-April for formal sanction to install the lamps. Earlier, the NHAI could not proceed with the letter sent by the corporation seeking approval as the NHAI officials were adamant on a proposal being submitted rather than a letter.