|Length||13.4 km (8.3 mi)|
|Route number(s)||National Route 1|
|North end||Patterson Road (National Route 1), East Rockingham|
|South end||Mandurah Road (National Route 1), Karnup|
Ennis Avenue is a major road between Rockingham and its southern suburbs and is part of Australia's National Highway 1 for all of its length. It is a controlled access road and after leaving Rockingham has only four intersections (Willmott Drive, Safety Bay Road, Royal Palm Drive and Port Kennedy Drive)—the alternative route is Read Street and Warnbro Sound Avenue which runs roughly parallel to and west of Ennis Avenue.
The Kwinana Freeway was built to Safety Bay Road in 2002, which means that Kwinana Freeway traffic going to Mandurah and the South West of Western Australia from Perth enters Ennis Avenue near its halfway point (7.5 km) at Safety Bay Road until the extension further south in 2009. The Warnbro railway station, which opened in December 2007, is next to this intersection.
The entire road's length is in the City of Rockingham, with all intersections controlled by traffic lights unless otherwise indicated.
|– boundary||0||0.0||Patterson Road (National Route 1 east, State Route 18 west)||Northern terminus at T junction favouring Patterson Road|
|– boundary||1.0||0.62||Dixon Road (State Route 22 eastbound) Murdoch University Rockingham Campus,|
|2.0||1.2||Council Avenue west/Carvie Street east||Access to Rockingham Centre shopping precinct|
|tripoint– -||2.4||1.5||Rae Road west/Rockingham railway station access road east|
|3.2||2.0||Grange Drive west/ Elanora Drive east - Rockingham General Hospital|
|3.2||2.0||Willmott Drive||Seagull intersection|
|Safety Bay Road (State Route 18) , Kwinana Freeway||Dumbbell-Dogbone interchange hybrid, northbound exit ramp looped; access to Warnbro railway station|
|9.2||5.7||Royal Palm Drive||Non-signalised seagull intersection|
|11.5||7.1||Port Kennedy Drive||Seagull intersection|
|tripoint– -||13.4||8.3||Stakehill Road West west/ Mandurah Road south/east (National Route 1 southbound)||Southern Terminus, road continues as Mandurah Road southwards. Mandurah Road east connects to the eastern continuation of Stakehill Road and to Kwinana Freeway via Karnup Road|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Australian Roads portal