Excepting as otherwise herein provided, the driver of a vehicle approaching an intersection shall yield the right-of-way to a vehicle which has entered the intersection from a different highway; and when two vehicles entering an intersection from different highways at approximately the same time, the driver of the vehicle on the left shall yield the right-of-way to the vehicle on the right.
(1975 Code, § 24.31) Penalty, see § 10.99