Nairobi–Mombasa Expressway Nairobi–Mombasa Expressway The Nairobi–Mombasa Expressway, also known as the Mombasa–Nairobi Expressway or the Nairobi–Mombasa Highway, is a proposed four-lane toll highway in Kenya. The highway will link Nairobi, the capital and largest city of Kenya to Mombasa, the largest seaport of the country. The new highway is expected to cut travel times between the two cities from the current 6 to 10 hours to approximately four hours. The road starts at the Namanga interchange along the Nairobi–Mombasa Road, in the city of Nairobi. It continues in a general southeasterly direction, through seven Kenya Counties to end in the city of
Mombasa and defeated the relief force sent by the Portuguese. In 1632 Dom Jeronimo left Mombasa and became a pirate. That year the Portuguese returned and established direct rule over Mombasa. With the capture of Fort Jesus in 1698, the town came under the influence of the Imamate of Oman, subordinate to the Omani rulers on the island of Unguja, prompting regular local rebellions. Oman appointed three consecutive Governors (Wali in Arabic, Liwali in Swahili): Mombasa briefly returned to Portuguese rule by captain-major Álvaro Caetano de Melo Castro (12 March 1728 – 21 September 1729), then four new Omani Liwali until