One of the selling points of Myki is that ‘Myki Money’ will charge you the best daily fare, if you touch-on and touch-off on every trip.
It turns out not to be always true. There’s at least one specific set of circumstances where it doesn’t.
The PTUA got asked a while back about travel around the zone boundaries, and specifically on a scenario similar to that outlined below. (I think the lady actually travels in the Surrey Hills area.)
Mckinnon to Caulfield at 9:05am. (Z1 2 hour, expires midday. $2.94)
Caulfield to Mckinnon at 10:05am. (existing fare. $0.00)
Mckinnon to Moorabbin at 11:05am. (Z2 2 hour, expires 2pm $2.02.)
Moorabbin to Mckinnon at 12:05pm. (existing fare. $0.00)
Metcard total $4.96
Here’s how it works on Myki Money:
McKinnon to Caulfield at 9:05am. (Product: Z1 2 hour, expires midday. $2.94)
Caulfield to Mckinnon at 10:05am. (existing product. $0.00)
Mckinnon to Moorabbin at 11:05am. (Upgrades the existing product to Z1+2 2 hour, expires midday. $2.02.)
Moorabbin to Mckinnon at 12:05pm. (Product: Z2 2 hour, expires 3pm. $2.02.)
Myki total $6.98.
I’ve received confirmation from the TTA that the calculation above is correct: that is, when Myki upgrades your existing (and still valid) fare to cover a new zone, it has the same expiry as the original fare, rather than allowing you the full 2+ hours.
This means in the scenario above, a passenger would be charged more on Myki than on Metcard. The only workaround is to use two Myki cards – just as one would do now to obtain the cheapest fare.
Admittedly this is a specific set of circumstances which is probably quite rare, and it depends on no other travel that day that would incur extra charges.
But it does show that Myki doesn’t necessarily give you the best fare.
What they should probably do is have the additional Z2 fare have its own expiry time — at least when the relevant journey (McKinnon to Moorabbin) can be made under a single zone fare.