I have just roughly gone over in red on the map where there is a bus every 15 minutes or less on a weekday interpeak (i.e. between 9 and 4), shoulder peak period (7-7ish, it varies), Saturday and Sunday. Note it is not 100% accurate.
A few points to note:
- Most major road corridors bus intervals are actually 10 minutes or better during the daytime Monday to Friday. Buses on most of these corridors also run every 15 minutes until 9pm weeknights.
- In peak periods, the majority of bus routes in the Transperth network run every 10 to 20 minutes.
- Majority of the high frequency services are within Zone 1 and Zone 2, however some extend further and provide good coverage as far south as Rockingham/Mandurah and as far north as Butler.
- Weekends and nights are not detailed. This is just a Monday to Friday, Saturday and Sunday base daytime frequency map.
- Only bus routes are outlined. It is not necessary to outline train lines because all Transperth urban rail lines have a frequency of 15 minutes or greater Monday to Friday daytime anyway.
- Inset A is not used to display frequencies.
- Perth, Fremantle and Joondalup CAT routes are shown as is the Midland Gate Free Shuttle.
It shows some strengths and weaknesses in the metropolitan area, however when you compare with similarly sized cities such as Adelaide and Brisbane and their Go Zone and BUZ networks respectively, Perth seems to win when it comes to cross-metropolitan frequencies and also the higher frequencies generally offered on radial routes out of the City. Some weaknesses although not visible or annotated, night time frequency on some of these routes is less than 1/4 of the day time frequency and the fact that since on some major corridors, bus routes start to stem off rather quickly out of the City, the high frequency is not maintained for long.
Colour codes:
Red: Every 1 to 15 minutes
Blue: Every 16 to 30 minutes
Green: Every 31 to 60 minutes
Monday to Friday Overall Network Frequency as of September 2015:

Monday to Friday Only High Frequency Services (15 mins or better) as of September 2015:

Saturday Only High Frequency Services (15 mins or better) as of September 2015:

Sunday Only High Frequency Services (15 mins or better) as of September 2015:
