Het Financieele Dagblad features an article on Herman Roebersen, director of Parkline. Parkline is a product to be used to pay for parking with the GSM. What's interesting in the article is that it becomes clear that last week he visited his competitor to discuss the common technical features of GSM parking. As a result, users would not be confronted with different systems and different interfaces.
Now, although this appears to be common sense to all, it appears that regulators or supervisors are only too often unware of the fact that standardisation will occur as a matter of common sense in the market. For a more elaborate discussion of this issue, please read this chapter on Standardizing Retail Payments.