Section 3321 - Vehicle approaching or entering intersection(a) General rule.--When two vehicles approach or enter 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.(b) Exception.--The right-of-way rule established in subsection (a) is not applicable:(1) on through highways, where the traffic on the through highway shall have the right-of-way;(2) on limited-access highways, where the traffic on the limited-access highway shall have the right-of-way;(3) in traffic circles, where the traffic in the traffic circle shall have the right-of-way; and(4) as otherwise provided in this part. 1976, June 17, P.L. 162, No. 81, § 1, effective 7/1/1977. Amended 1986, Dec. 11, P.L. 1530, No. 166, § 5, effective in 60 days.