Motorists travelling on one of KwaZulu-Natal’s busiest highways are being urged to prepare for significant traffic delays as SANRAL begins a major R6 billion upgrade of the N3. The South African National Roads Agency SOC Limited (SANRAL) says construction is now underway on an 11.1km section of the N3 between the Mariannhill Toll Plaza and Key Ridge. The extensive project forms part of SANRAL’s long-term plan to improve one of South Africa’s mos…