I have recently realised the potential death trap that is the Plympton Park tram / pedestrian / bike crossing. See the attached file for some images about this issue. This crossing is currently putting lives of both adults and kids (including school children) at risk every day (during peak hour traffic). The crossing is regularly used by cyclists riding along the Mike Turtur bike path between Glenelg and the Adelaide CBD, which claims to be the busiest bike commuting route in Adelaide.
Some more details on the problem and how the numerous near misses that I’ve witnessed occur:
I consider the fix to be a pretty simple one, and involves installing two additional stop lights on the eastern side of the tram crossing that are linked to the ones on the western side of the tram crossing. These are only required for the east-bound lanes on the northern side of Cross Road.
The 14m length between the level crossing and the ped/bike crossing means the whole lot needs to be considered as one complex.
A 'total length' of over 50m is not unique among level crossings in the Adelaide metro area which include a greenway parallel to the railway/tramway. Diagonal Road southbound traffic and East Ave southbound traffic (both Seaford Line + Marino Rocks Greenway) both have a 51m total length. Brighton Road in both directions is 54m. Cormack Road is well over 50m in both directions despite not having a parallel pedestrian crossing.
Marion Road gets the greater share of green light time, so the effect on the flow of Cross Road traffic will be just that some drivers get to the next red light a few seconds later at times when traffic is moving slowly. I think most on here would agree that a delay to some drivers with no actual net effect is an acceptable compromise for a solution that protects users of the ped/bike crossing (a few at a time) without adding any extra danger for tram users (two staff and up to 140 passengers at a time).
When traffic is light and flowing freely, no impact at all.
Peter, I not am familiar with the crossing, but your drawing easily explains a potential hazard. Another instance of a picture is worth a thousand words.
Look on the bright side. Jay Weatherill has promised to grade separate this tram line crossing if reelected. Might take a few years though.