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Thanks. That implies that the underpass see's 2/3 to 3/4 of the traffic compared to other nearby sections. That would likely imply that while 2 lanes either direction is low for a freeway, it's unlikely to be a major bottleneck if those other sections are only 3 lanes.
That is with current traffic volumes. Given this section of the motorway wont be operational for a least a decade, and there will be some induced demand, it would surely be best to keep the middle sections 3 lanes? Comparisons with the southern Expressway are not really relevant, as it carries mostly private car traffic, and not so much freight. Trucks trying to merge is not ideal.Nort wrote: ↑Wed Mar 13, 2019 2:56 pmThanks. That implies that the underpass see's 2/3 to 3/4 of the traffic compared to other nearby sections. That would likely imply that while 2 lanes either direction is low for a freeway, it's unlikely to be a major bottleneck if those other sections are only 3 lanes.
Interesting that they deleted the Ayliffes Road to Southern Expressway video at some point today - it was there earlier but it's now unavailable. I didn't see anything too controversial about it so I don't know why they took it off... hopefully comes back on soon though.Norman wrote: ↑Wed Mar 13, 2019 12:00 pmA new video has been posted by DPTI showing the journey from Tonsley to Flinders Drive.
https://youtu.be/A1cAjoM-c_A
And Ayliffes Road to Southern Expressway
https://youtu.be/wIUhogWAHGU
I have no experience in traffic engineering, nor any knowledge of hypothetical plans for the future around this section, but perhaps two lanes through the underpass is "better"...claybro wrote: ↑Wed Mar 13, 2019 4:53 pmThat is with current traffic volumes. Given this section of the motorway wont be operational for a least a decade, and there will be some induced demand, it would surely be best to keep the middle sections 3 lanes? Comparisons with the southern Expressway are not really relevant, as it carries mostly private car traffic, and not so much freight. Trucks trying to merge is not ideal.Nort wrote: ↑Wed Mar 13, 2019 2:56 pmThanks. That implies that the underpass see's 2/3 to 3/4 of the traffic compared to other nearby sections. That would likely imply that while 2 lanes either direction is low for a freeway, it's unlikely to be a major bottleneck if those other sections are only 3 lanes.
I saw both videos at lunchtime, but the second one is now unavailable. I thought I saw one of them fly through a red light, but can't see it in the remaining one, and the other one was mostly expressway so wouldn't have had traffic lights.phenom wrote: ↑Wed Mar 13, 2019 6:56 pmInteresting that they deleted the Ayliffes Road to Southern Expressway video at some point today - it was there earlier but it's now unavailable. I didn't see anything too controversial about it so I don't know why they took it off... hopefully comes back on soon though.Norman wrote: ↑Wed Mar 13, 2019 12:00 pmA new video has been posted by DPTI showing the journey from Tonsley to Flinders Drive.
https://youtu.be/A1cAjoM-c_A
And Ayliffes Road to Southern Expressway
https://youtu.be/wIUhogWAHGU
On a positive note I'm almost happy to see DPTI no longer allow comments on their videos - it was getting very AdelaideNow style of deliberate idiocy on almost every video.
That's why I asked about proportions of traffic. Either way there will be merging whether it's traffic in the left lane merging so as to not leave if the underpass is 2 lanes, or traffic merging as it enters if the underpass is 3 lanes. From a safety perspective it would seem to me like the former is safer as there can be more notice and time for traffic to prepare.claybro wrote: ↑Wed Mar 13, 2019 4:53 pmThat is with current traffic volumes. Given this section of the motorway wont be operational for a least a decade, and there will be some induced demand, it would surely be best to keep the middle sections 3 lanes? Comparisons with the southern Expressway are not really relevant, as it carries mostly private car traffic, and not so much freight. Trucks trying to merge is not ideal.Nort wrote: ↑Wed Mar 13, 2019 2:56 pmThanks. That implies that the underpass see's 2/3 to 3/4 of the traffic compared to other nearby sections. That would likely imply that while 2 lanes either direction is low for a freeway, it's unlikely to be a major bottleneck if those other sections are only 3 lanes.
I saw the clips earlier today too - In the second video the camera definitely ran a red light right at the beginning as it crossed Shepherds Hill Rd - I watched it twice to be sure!SBD wrote: ↑Wed Mar 13, 2019 7:33 pmI saw both videos at lunchtime, but the second one is now unavailable. I thought I saw one of them fly through a red light, but can't see it in the remaining one, and the other one was mostly expressway so wouldn't have had traffic lights.phenom wrote: ↑Wed Mar 13, 2019 6:56 pmInteresting that they deleted the Ayliffes Road to Southern Expressway video at some point today - it was there earlier but it's now unavailable. I didn't see anything too controversial about it so I don't know why they took it off... hopefully comes back on soon though.Norman wrote: ↑Wed Mar 13, 2019 12:00 pmA new video has been posted by DPTI showing the journey from Tonsley to Flinders Drive.
https://youtu.be/A1cAjoM-c_A
And Ayliffes Road to Southern Expressway
https://youtu.be/wIUhogWAHGU
On a positive note I'm almost happy to see DPTI no longer allow comments on their videos - it was getting very AdelaideNow style of deliberate idiocy on almost every video.
The three-year-old concept video has five lanes northbound and four lanes southbound just south of Sturt Road. https://www.youtube.com/watch?v=MR3GQvwUKEI
