The problem with simpler rules is that it would basically be "No Parking, Anytime". Often, the reason parking is prohibited during certain times is to open the

The problem with simpler rules is that it would basically be "No Parking, Anytime". Often, the reason parking is prohibited during certain times is to open the lane up for rush-hour. If the rule had to be simplified, I think traffic decongestion would win over parking availability. Now imagine that same stretch of road gets sweeped every Tuesday at 2PM. The simplest rule to cover these situations—and still allow parking at all—has to somehow be communicated. I don't care too much for the signs in the linked article, but I hate even more the existing signs that are all hodge-podgy. At least these signs standardize the information somewhat, so even if they are complicated to read, once you get used to them you'll be able to grok it at a glance.