It runs from the junction with Tsui Ping Road and Kwun Tong Road near MTR Kwun Tong station to the roundabout with Ko Chiu Road near Lei Yue Mun Estate in Yau Tong.
[1] The road is named after Lei Yue Mun, a channel roughly 1 km away from its south end.
[2] From west to east, Lei Yue Mun Road succeeds Route 7 from Kwun Tong Road near Tsui Ping Estate, then passes the Kwun Tong Recreation Ground, and transitions into Route 2 from Route 7 at the junction with Tseung Kwan O Road.
Then it merges with the Kwun Tong Bypass under Lam Tin station, Lam Tin Bus Terminus and Sceneway Garden, and then approaches the Lei Yue Mun Interchange.
The road then passes Yau Tong station and ends at a second intersection with Ko Chiu Road, at a roundabout near Lei Yue Mun Estate and Yau Tong Bus Terminus.