The airport will have the capacity to handle heavy commercial aircraft.
This marks the start of the process of construction of the much awaited bypass.
The security system is jointly funded by the World Bank and the Kenyan government.
The highway provides a reliable transport corridor linking Kenya with her neighbours.
Experts say the project is likely to destroy the environment, especially mangrove plantations.
17 companies had tendered for the project by the October 12 deadline.
The 2,000-km pipeline will be built at a cost of US$3 billion.
Installation of the security system is set for completion in March next year.
The highway has been split into three sections for construction works totaling 50.4 km.
Thika Superhighway was completed and officially opened in 2012.
Talks are underway for China to fund a new highway and rail extension.
The Chinese-funded Orpower 22 power plant will take 17 months to complete.
Bedsitters will rent for Sh3,200 per month on a 30-year rent-to-own plan.