"I don't mind paying 1.08 dollars. It takes me 30 minutes from the office at KNH to Kitengela, thanks to the expressway. This is something that we could only dream of in the past," said Catherine Kariuki, a records officer.
Besides the Kitengela-Upper Hill route, several other routes have been started by commuter bus companies.
Super Metro, another matatu sacco, operates the Kitengela-Westlands route in the west of the Kenyan capital.
Then, there are dozens of others that run from the city center to various residential areas in the south of the capital, including Athi River, Mlolongo, and Syokimau.
"We run the Kitengela-Westlands route during morning and evening peak hours. So far, so good despite the high fuel prices," said James Kamau, a conductor with Super Metro. He said as fuel prices rise to a record high, the road is making bus operators save fuel costs and time, and earn some good profit.
MOJA noted that the savings on fuel made by motorists are immense.
According to the firm, a recent study highlighted that if a motorist makes 10,000 trips using the electronic payment option, they save about 314 liters of fuel. "The Nairobi Expressway not only reduces travel time but also minimizes fuel consumption, saving you money," the company said in a notice.
Constructed by China Road and Bridge Corporation (CRBC) and opened for use in 2022, the Nairobi Expressway has become a game changer and a darling of motorists.
During construction, it was widely expected that the majority of the road's users would be middle- and upper-income private motorists, since matatus are mainly used by low-income earners.
As many matatus as private motorists are now using the road, with many commuters and motorists working in Upper Hill and Westlands using only the Expressway route.
MOJA Expressway CEO Steve Zhao said in a recent update that more than 17 million vehicle trips have been made on the road since it was opened for use a year ago.
He said that on average, 60,000 vehicles daily use the Expressway -- the first double-decker road in Kenya.
MOJA has made it attractive and easy for motorists to use the road, including by giving discounts to those who embrace the electronic payment system. This has made the electronic toll collection system the dominant payment method as thousands of motorists make the Expressway their road of choice.