Gipps and Stanley Streets traffic conclusions

Based on the traffic data recorded and previously introduced, a number of patterns have been distinguished for traffic movements along Gipps and Stanley Streets, Richmond. These patterns will be very useful in planning the theoretical usage of the site. As noted in my previous entry, observation sessions examined the numbers of cars, bicycles and pedestrians using the two streets, the number of arrivals and departures, direction of travel, and time taken for each user to move through the street.

This analysis uses the data collected to arrive at an understanding of how the site is currently used, why this may be, and how this may affect future planning. You can download an excel spreadsheet containing the full set of observational and analytical data here (39kb).

20140924 gipps and stanley traffic conclusions #1
Overall average number of users of each street per hour

Using this data, it would appear that on average:

  • 1031 cars use Gipps Street each day, compared to 400 for Stanley Street.
  • 35 bikes use Gipps Street each day, compared to 9 for Stanley Street.
  • 223 pedestrians use Gipps Street each day, compared to 157 for Stanley Street.
  • It is likely that these totals are a bit high, as they have not taken into account an assumed reduction of traffic through the night.

As mentioned in my previous post, there was a strong variation between so called peak and off-peak periods. Here’s a more in-depth look at how they compared:

  • Gipps Street has 15% more cars during the day than during morning and evening peak periods. It has consistent car use on weekends.
  • Stanley Street has 38% more cars during the day than during morning and evening peak periods. It has 9% fewer car on weekends.
  • Gipps Street has 66% fewer bicycles during the day than during morning and evening peak periods. It has consistent bicycle use on weekends.
  • Stanley Street has 20% fewer bicycles during the day than during morning and evening peak periods. Only one bicycle was observed on the weekend, in the evening.
  • Gipps Street has 27% fewer pedestrians during the day than during morning and evening peak periods. It has 13% more pedestrians on weekends.
  • Stanley Street has 89% more pedestrians during the day than during morning and evening peak periods. It has 6% fewer pedestrians on weekends.
20140924 gipps and stanley traffic conclusions #2
Overall average travel time for users of each street

Using this data, it would appear that on average:

  • On weekdays, cars move at a speed of 24.7km/h on Gipps Street and 24.1km/h on Stanley Street.
  • On weekends, cars move at a speed of 23.9km/h (3.5% slower) on Gipps Street and 25.4km/h (4.8% faster) on Stanley Street.
  • On weekdays, bicycles move at a speed of 19.0km/h on Gipps Street and 16.6km/h on Stanley Street.
  • On weekends, bicycles move at a speed of 18.3km/h (3.6% slower) on Gipps Street and 16.6km/h (the same speed) on Stanley Street.
  • On weekdays, pedestrians move at a speed of 5.6km/h on Gipps Street and 7.1km/h on Stanley Street.
  • On weekends, pedestrians move at a speed of 6.5km/h (1.6% faster) on Gipps Street and 6.01km/h (17.5% slower) on Stanley Street.

Additionally:

  • Cars and bicycles rarely have to wait at the roundabout, permitting rapid travel times.
  • The surveyed section of Stanley Street was larger than that of Gipps Street, accounting for the longer travel time.
20140924 gipps and stanley traffic conclusions #3
Overall difference in weekday and weekend traffic for Gipps Street
20140924 gipps and stanley traffic conclusions #4
Overall difference in weekday and weekend traffic for Stanley Street

Gipps and Stanley Streets have a similar ratio between car, bicycle and pedestrian use.

20140924 gipps and stanley traffic conclusions #5
Overall difference in arrivals and departures between streets

Using this data, it would appear that on average:

  • In Gipps Street, 3% of cars either arrive in or depart from the area. Of the 172 cars observed each hour, 5 arrive or depart.
  • In Stanley Street, 13% of cars either arrive in or depart from the area. Of the 67 cars observed each hour, 9 arrive or depart.
  • In Gipps Street, 10% of bicycles either arrive in or depart from the area. Of the 12 bicycles observed every two hours, 1 arrives or departs.
  • In Stanley Street, 10% of bicycles either arrive in or depart from the area. Of the 10 bicycles observed every five hours, 1 arrives or departs.
  • In Gipps Street, 6% of pedestrians either arrive in or depart from the area. Of the 37 pedestrians observed each hour, 2 arrive or depart.
  • In Stanley Street, 16% of pedestrians either arrive in or depart from the area. Of the 26 pedestrians observed each hour, 4 arrive or depart.
20140924 gipps and stanley traffic conclusions #6
Proportion of turning directions from each side of the intersection
  • Very few cars exit the roundabout travelling north, making it by far the least utilised side of the intersection.
  • For the most part, turning is an irregularity. Most cars travel directly through.
  • The western side of the roundabout is by far the most popular exit for turning traffic.
20140924 gipps and stanley traffic conclusions #7
Balance of traffic on either side of the intersection
20140924 gipps and stanley traffic conclusions #8
Traffic volume of additional street users beyond cars, bicycles and pedestrians

From this information, these overall conclusions can be reached:

  • Both Gipps and Stanley Streets appear to ignore the regular peak hour of Melbourne, with more cars on the road during the middle of the day.
  • Gipps Street facilitates a significantly higher amount of traffic than Stanley Street. This is most likely a result of rat-running by cars avoiding nearby Swan Street.
  • The ratio of cars and bicycles to pedestrians is much higher on Gipps Street, indicating that Stanley Street is either more usable for pedestrians in its current state, or that there is a higher demand for pedestrian usability.
  • The speed of users varies greatly between modes of transportation, but only marginally between streets. Increased traffic on Gipps Street has no impact on the overall speed, indicating that both streets facilitate traffic flow far better than they need to.
  • Proportionally, pedestrian usage of the streets is much higher on weekends. This would indicate that weekday car and bike traffic is largely work related.

With traffic observations and analysis wrapped up, the next step will be to consult the local community on their opinions of the street. Stay tuned to find out what residents feel is lacking in the street, what they might want in the street, and how they think such a project should be rolled out.


Image sources

  1. Overall traffic volume, this and subsequent images copyright the author.
  2. Traffic speed.
  3. Weekend traffic – Gipps Street.
  4. Weekend traffic – Stanley Street.
  5. Arrivals and departures.
  6. Cardinal traffic balance of intersection.
  7. Turning directions at intersection.
  8. Other street users.
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