Alexander Street traffic analysis

A traffic study on Alexander Street was conducted in order to determine the volume and nature of traffic in the street. The study was designed to look at three modes of travel: car, bicycle and walking. I took note of how fast they were going, how long they spent in the street, which direction they came from and whether they were arriving, departing or passing through. I conducted these observations across 6 periods of study: morning peak, midday, evening peak, night time, weekend morning and weekend evening.

Alexander Street is subject to very low traffic conditions throughout the day, with the morning peak period experiencing the highest volume of traffic and night time the lowest.

The diagram below depicts the observed volumes of traffic for each hour period, making note of whether they were arriving, departing or passing through, and the direction in which they travelled.

20140930 alexander street traffic #1

The following diagram shows the average amount of time each mode of transport spent in Alexander Street and the speed at which they travelled. There was very little observed difference in this data across the 6 observation periods.

20140930 alexander street traffic #2

Traffic conclusions

Given the low volume of through traffic recorded, it is clear that Alexander Street is used primarily by its residents. The through traffic that does exist is due to northbound traffic from Gold Street that uses Alexander Street to avoid the intersection with Alexandra Parade. Cars who intend to head west on Alexandra Parade will use the Alexandra Parade slip lane at the end of Alexander Street in order to avoid the traffic lights on Gold Street. Gold Street can get quite busy, hence it makes sense to rat run through Alexander Street. Note that the adjacent Ballarat Street has been closed off to prevent this from occurring (see diagram below).

20140930 alexander street traffic #3

One option to reduce traffic to Alexander Street further would be to block access to the Alexandra Parade slip lane as has been done to Ballarat Street. Alternatively, I could introduce a shared traffic space heading north to make it less enticing as a thoroughfare. This approach could easily be extended to Forest and Bendigo Streets to the west, to prevent adverse traffic conditions in those streets.

Image sources

  1. Street traffic data, this and subsequent images copyright of author.
  2. Average time spent.
  3. Rat run diagram.

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