Johnston Street traffic conclusions

The traffic surveys of Johnston Street identified a number of patterns in the frequency, usage and movement of cars, bicycles and pedestrians through the street between Hoddle and Gold Streets. The overall observation of the study area shows that Johnston Street functions as a busy arterial road, carrying significant volumes of traffic, especially cars.

20140929 johnston traffic conclusions #1

20140929 johnston traffic conclusions #2

  • 16,240 cars use Johnston Street per day. The frequency of cars along the street is one car journey every 7 seconds, travelling at an average speed of 38km/h during peak times and 44km/h during off-peak times.
  • 1,232 bicycles use the street per day. The frequency of bicycles is one bicycle journey every 62 seconds, travelling at an average speed of 27km/h during peak times and 29km/h during off-peak times.
  • 2,952 pedestrians use the street per day. The frequency of pedestrians is one pedestrian journey every 26 seconds, travelling at an average speed of 9km/h. The average speed of pedestrians remains fairly consistent between peak and off-peak periods.
20140929 johnston traffic conclusions #3
Average speed and time during peak hours
20140929 johnston traffic conclusions #4
Average speed and time during off-peak hours
  • On average, cars spend 32 seconds travelling between Hoddle Street and Gold Street during peak periods and 27 seconds during off-peak periods.
  • During the morning peak, cars travelling west towards the city take 32 seconds to move through the street; while cars travelling in the opposite direction take 27 seconds. This pattern is inverted during the evening peak.

20140929 johnston traffic conclusions #5

  • On average, bicycles spend 45 seconds travelling between Hoddle Street and Gold Street during peak periods and 42 seconds during off-peak periods.
  • On average, pedestrians spend 134 seconds travelling between Hoddle Street and Gold Street during both peak and off-peak periods.

20140929 johnston traffic conclusions #6

The overall observation reveals a substantial difference between peak and off-peak periods.

  • In off-peak periods, the frequency of cars along Johnston Street is one car journey every 10 seconds. In peak periods, the frequency is one car journey every 4 seconds.
  • In off-peak periods, the frequency of bicycles along Johnston Street is bicycle journey every 86 seconds. In peak periods, the frequency is one bicycle journey every 37 seconds.
  • In off-peak periods, the frequency of pedestrians along Johnston Street is one pedestrian journey every 36 seconds. In peak periods, the frequency is one pedestrian journey every 19 seconds.

20140929 johnston traffic conclusions #7

The observations also looked at the number of journeys that arrive into and depart from the subject area. This showed that only a small percentage of cars, bicycles and pedestrian journeys start or finish within the subject area and that most of the traffic along Johnston Street is made up of those that are passing through.

  • 5% of car journeys are arrivals and departures. In peak periods, 40 cars arrive or depart per hour. In off-peak periods, 33 cars arrive of depart per hour. A total of 818 cars arrive into or depart from the subject area per day.
  • 7% of bicycle journeys are arrivals and departures. In peak periods, 11 bicycles arrive or depart per hour. In off-peak periods, 12 bicycles arrive or depart per hour. A total of 284 bicycles arrive into or depart from the subject area per day.
  • 16% of pedestrian journeys are arrivals and departures. In peak periods, 17 pedestrians arrive or depart per hour. In off-peak periods, 23 pedestrians arrive or depart per hour. A total of 460 pedestrians arrive into or depart from the subject area per day.

A summary of conclusions that have come from the traffic surveys are:

  • Johnston Street is a traffic thoroughfare, with a high percentages of traffic (cars, bicycles, pedestrians) passing through as opposed to arriving or departing.
  • The high volume and frequency of cars along the street means that Johnston Street is primarily occupied by vehicle movement.
  • Johnston Street is not as well used by pedestrians and bicycles.
  • The direction and volume of journeys along the street changes over the period of the day. Weekday morning peak periods carry large volumes of traffic towards the city and destinations further along Johnston Street such as Smith Street and Nicholson Street. Weekday evening peak periods carry large volumes of traffic towards Hoddle Street, the Eastern Freeway and Victoria Park Station (especially for pedestrians). Weekday afternoons, weekday nights and weekend afternoons carry higher volumes of pedestrian journeys towards the city and destinations further along Johnston Street such as Smith Street, Brunswick Street and Nicholson Street.
  • Peak periods, as opposed to off-peak periods, yield higher usage of the street by cars, bicycles and pedestrians.

Image sources

  1. Average frequency of journeys, this and subsequent images copyright of author.
  2. Peak and off-peak journeys.
  3. Speed and time during peak hours.
  4. Speed and time during off-peak hours.
  5. Average journey times east and west.
  6. Peak and off-peak frequencies.
  7. Arrivals and departures.
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