Originally Posted by
KLflyerRalph
you are required to tap in and out with a disposable ticket from the machine or counter. Otherwise your ticket is not valid even though it is dated, routing specific and prepaid. Weird but that's how it is.
Not necessarily weird. Tapping in and out at gated stations ensures that a ticket can only be used once. At ungated stations, I suppose it depends if you have a good story to tell any ticket inspectors about why you tapped in 5 hours ago...
By the way, the machines accept a maximum of 36 coins per purchase. Once you have inserted that many, the machine hangs for about 10 seconds and then spits all your coins back out at a rate of 1 coin every 1.5 seconds.
10c is the smallest coin accepted.