I presume that if you set a radius of X minutes, what you will see is a measure of where you could get to in a given time by public transit if the bus/train arrived just as you wanted to leave. It would be worth spelling this out if that is the case, as it doesn't take into consideration frequency or time of day. But a casual user might think it reflects a "typical" journey time including waiting time for example. Something to this effect could be added to the "about" text? Does it assume optimal transfers if more than one journey would be needed to get to the destination? If there are multiple transit operators covering a city and not all are included, a note in the info for a location should indicate if possible.
I presume that if you set a radius of X minutes, what you will see is a measure of where you could get to in a given time by public transit if the bus/train arrived just as you wanted to leave. It would be worth spelling this out if that is the case, as it doesn't take into consideration frequency or time of day. But a casual user might think it reflects a "typical" journey time including waiting time for example. Something to this effect could be added to the "about" text? Does it assume optimal transfers if more than one journey would be needed to get to the destination? If there are multiple transit operators covering a city and not all are included, a note in the info for a location should indicate if possible.