To create the left exit, work was carried out in phases, with diversions to minimise disruptions to traffic on the PIE.
“Engineering challenges encountered include having to contend with a unique terrain with shallow rock outcrops and working within a narrow working corridor beside a ‘live’ expressway,” said LTA.
“Controlled rock blasting was carried out in stages to remove the granite rock outcrop. This phase had been carefully calibrated due to the proximity of the site to residential developments and the PIE.”
It added that COVID-19 and the manpower crunch posed additional challenges to the project.
In the coming weeks, traffic signs will be put up to inform and guide motorists on the relocation of the exit.