From memory the proposed crossing of the Port Expressway is via a culvert prone to flooding. Of marginal usefulness in other words, just like the Dry Creek underpass at Port Wakefield Rd which is often a metre deep.
Cycling infrastructure, merely an afterthought yet again. Sigh.
I hope PortBUG are able to negotiate a more practical solution.
"just like the Dry Creek underpass at Port Wakefield Rd which is often a metre deep."
The group went to cross it again a few days ago, , it's a bloody disgrace ! I believe it's affected by high tides as well , + no drainage . Well done whoever designed this !
I would love to speak face to face to the engineer who okayed it and ask some pointed questions about his design. It was bad enough before they added the downstream wing wall, now it just traps run off from the highway above. Why wasn't a one way drain valve added at the lowest point? It beggars belief that anyone could sign off on the job and keep a straight face.
Before the downstream wing wall was added at least it would drain out every day:
From Cycling Aspects of Austroads 2017, page 107 or pdf page 116
Use of existing culverts
. . . A drainage culvert should not cater for cyclist/pedestrian use unless it satisfies the recommendations in Section 7.6.2 of the Austroads Guide to Road Design Part 6: Road Design, Safety and Barriers (AGRD06, (Austroads 2010a)) for drainage, whilst providing adequate vertical clearance. Appropriate warning signs should be installed advising of alternative crossing points for use during higher water flows. A connecting path between the recreational path and the road is always provided to facilitate access to the path and is generally suitable for use as a bypass during high water flows. It is essential that good sight distance is provided to the culvert entrances so that cyclists have adequate warning and can see any debris, silt, etc. that may have built up around and in the culvert during and after these conditions.
If an underpass is used the alignment of the path on the approach should be designed such that users can see through the culvert. Vandal-proof lighting should also be provided in underpasses for shared paths.