Traffic congestion in Nairobi will be highly reduced after President Uhuru Kenyatta announced the start of trials on the newly constructed expressway.

"This week on Saturday, we shall open, not officially, on a trial basis, so that Kenyans use it, and also to allow us put final touches on some unfinished sections," he said.

The 27 Kilometre expressway will be operated by Moja Expressway, a subsidiary of China Road and Bridge Corporation (CRBC) which designed, financed and constructed the road. Motorists willing to participate in the trials will register through the company.

The base toll charge for using the Expressway from Mlolongo to the James Gichuru exit in Westlands is currently set at Ksh.360 while the cost of using the Expressway between the Jomo Kenyatta International Airport (JKIA) and Westlands is Ksh. 300.

The cost of using the road from the Standard Gauge Railway (SGR) to the Museum Hill interchange is also set at Ksh. 300.

Heavy trucks will pay a higher amount while tuktuks and Bodaboda will not be allowed to access the expressway.