The festival will be held Saturday and Sunday from 9 a.m. to 5 p.m. on the city's Main Street, event organizers said.
State Highway 92, known as a critical artery for the journey to the pumpkin festival, was widened from two to four lanes in the areas around Main Street and state Highway 1.
In addition, Half Moon Bay's downtown area was repaved, the medians were landscaped and decorative street lighting was implemented, according to organizes of the pumpkin festival.
The Highway 92 improvement project also provides easier access for pedestrians and bicyclists.
The Metropolitan Transportation Agency, the city of Half Moon Bay and state and federal sources funded the $21.8 million project, event officials said.