Every signal controlled intersection should have protected pedestrian crossings on every side of every street.
Yet this is not the case in much of Sydney. T-intersections often are missing a pedestrian crossing. Not only are marked crosswalks missing, walk signals are missing too, and pedestrians are discouraged from crossing. The reason is presumably convenience for the automobile.
These intersection designs increase both the inconvenience to the pedestrian (who must now engage in the double-cross, crossing two street instead of one), and their vulnerability (as the amount of time the pedestrian is crossing a potential car path is greatly increased.
The largest intersection I have encountered where this is an issue is City Road at Broadway. This is technically a 4-way intersection, but it operates much like a T-intersection as the fourth leg is offset and less trafficed.
At this site, to get from the east side of City Road (where you start if you are on the Darlington campus of the University of Sydney, 5 minutes of way) to the north side of Broadway (which is a former Department Store that now houses a nice shopping mall) requires crossing both streets (City Road and Broadway) instead of just one (Broadway).
And in fact, the pedestrian must face three traffic signals instead of one, due to the pedestrian refuge island in the traffic stream for the convenience of the few City Road motorists traveling west on Broadway/Parramatta Road.
In the second half of 2017, I supervised a first year undergraduate student Tingsen Xian on an independent student project to redesign the intersection of Broadway and City Road in Sydney.
At one corner of this intersection is Victoria Park (lower left) and the University of Sydney (just off site), at another is the Broadway Shopping Center. This intersection has a high pedestrian count, high bus count, reasonably high car count, is very wide (befitting the name “Broadway”), and has long delays, especially for pedestrians. The proposed alternative removes the free left turn and porkchop pedestrian island on the southwest corner, gives more space to pedestrians, buses (red), and bicyclists (green), and less space to cars, and the signal retiming reduces total person delay by 1.5% (a lot for pedestrians, while increasing it somewhat for car users), and sends the right incentives. The revised layout is shown in the image.
You can download the full report with more graphics, tables, and yes, equations here: broadway-city-road.
[Obviously there are simplifying assumptions in any engineering analysis, and limited measurements and time to conduct the study, but I think the results are better than official results which don’t consider pedestrian delay when timing intersections. It suggests professionals should be able to do a lot better than they have done here.]
There are other sites with missing crossings. Mitchell Road and Fountain Street in Alexandria (A T-intersection) comes to mind. The misnamed and malformed Green Square train station has some too.
I don’t know of a good tool to catalogue all of these in Sydney, but feel free to leave examples in the comments.
Some of this post is adapted from an earlier post on my Transportist blog.
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