I was looking at the timetable for routes 215 & 220 this morning, and it struck me that the common section (Tingalpa to the city) does not have equal spacing.
e.g. on Saturdays, the 220 inbound departs Tingalpa at :21 and the 215 at :00. Both routes are hourly.
Sundays are similar, but the departure times are slightly different, the 220 departing Tingalpa at :20 and the 215 at :59.
The outbound routes have similar odd spacing, departing the City on Saturdays at :35 (220) and :02 (215), and on Sundays at :35 (220) and :57 (215). Weekdays off-peak displays a similar lack of consistency.
Can anyone explain why these routes aren’t aligned to operate every 30 minutes between Tingalpa and the City? It would seem logical to me, but here we are.
There’s also the question of why both these routes don’t operate every 30 minutes, with 15 minute frequency through the combined section, but I guess that’s a different topic.
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I used to live where my two buses were the 454 and the 460 and after 7PM they were both hourly and ran five minutes apart, even though they had a common first half of the route. It was infuriating and so wasteful. Fixing these seem like such low hanging almost zero cost fruit.
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I was out taking some pics this afternoon of some of the bus routes that will be changing and noticed the 338 (ex 370) and 348 (ex 375) will run outbound about a minute or two apart during the weekday off peak. 
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Oh yeah I should mention: I have Theory about this.
(Basically you assume passengers arrive uniformly & catch the first service available, then integrate to get the evenly-spaced frequency with equivalent average wait times.)
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Yup.
Wynnum road bus services are a mess. It shouldn’t be too kuch to expect such a major road through so much density and major destinations (employment, education, shopping, leisure) would have a legible, frequent bus service (or coordinated set of services)
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