The road, which is toll free, was built using a Japanese loan with support from the Kenya Government.
On Wednesday, the eagerly awaited moment to use the Dongo Kundu bypass came to be after a contractor of the Sh40 billion project handed over to the government, giving locals their first chance to use the infrastructure.
The bypass, which connects Miritini and Kwale County with three bridges, was opened with users now expected to spend just 45 minutes from the Miritini Standard Gauge Railway station to Diani. Usually, this journey would take more than two-and-a-half hours if connecting with a ferry.