right hand traffic on access road to Wat Phrom Yan Rangsan

Other than usual in Thailand, a segment of the access road to Wat Phrom Yan Rangsan and back is dedicated right hand traffic according to painted road markings (arrows) on the segment with a wide physical divider with one-way traffic in both directions. The reason is unknown, might have a relation to the more or less steep grade from the car park to the temple. Pictures could be provided as proof.