The Nairobi-Mombasa Highway is a major road in Kenya that connects the capital city, Nairobi, to the coastal city of Mombasa. Spanning approximately 480 kilometers, it serves as a vital transportation route for both goods and passengers, facilitating trade and tourism between the interior and the coast. The highway is part of the A109 road and features several towns and attractions along the way, including Machakos and Voi. It has undergone significant upgrades to improve safety and efficiency, making it an essential artery for economic activities in the region.