The Nairobi to Thika superhighway that forms part of the ongoing road infrastructure improvements, had road markings painted on some sections. The four lane road is the flagship project for Kenya's Vision 2030.
The $330million project involves widening of University Way to eight lanes from six, four lane fly over across Globe Roundabout, widening of Murang’a Road to six lanes, underpass at Pangani, flyover on Muthaiga roundabout and provision of footpaths.
On the Forest Road – Museum Road – Museum Hill roundabout section, involves widening of Forest Road to six lanes from four lanes, widening of Museum Hill road to six lanes, provision of forked fly-over on Limuru Road and provision of footpaths.
The Muthaiga roundabout-KU section has been designed as a high-speed highway with limited access and exits. The improvements on this section include widening of carriageway to eight lanes- (Muthaiga – Kasarani) and 6 lanes (Kasarani – KU). Provision of service roads intermittently, construction of underpasses at Kahawa and KU, provision of interchange at GSU roundabout, flyovers at Kasarani and Githurai roundabouts, underpass at former Nakumatt Thika Road site, subway at Survey of Kenya and provision of footpaths.
KU-Thika section includes widening the carriageway to six lanes up to Juja and maintaining the existing provision of service roads, construction of six lane flyover at Eastern Bypass, intermittent service roads, underpass at Ruiru sports club and at Mang’u High School as well as provision of footpaths.
The widest section of the Nairobi-Thika highway, between Muthaiga roundabout and Roysambu, just beyond the Moi International Sports Centre, Kasarani, consists of four express lanes on either side as well as two-lane service roads on each side.
The highway has six projects within it that are being worked on simultaneously.