ACCRA, Ghana — Voters in Ghana went to the polls on Friday to select their next president in a ballot expected to mark the sixth transparent election in this West African nation, known as a beacon of democracy in a tumultuous region.

Proud of their democratic heritage, residents of this balmy, seaside capital trudged to the polls more than four hours before the sun was even up, standing inches apart in queues that in some places stretched 1,000 people deep.