This is a phrase you hear more and more, particularly in the broadcast media, but the print world is guilty of it as well.
For example, I Googled the phrase in a news search yesterday, and got 850 results, including such august publications as the New York Times and the Wall Street Journal. To be fair, I was sent to Google after hearing it on CBC (radio) news recently.
A timetable, by it’s very nature, is specific. Otherwise, it is quite useless, as evidenced by the “non-specific” timetable I’ve created for the fictional Godot Buslines.
Freak level on this phrase: 7 gobsmacks out of 10.