Just a heads-up to anyone who is uncertain or unaware: The intersection of Central Expressway’s frontage roads and Mockingbird Lane is just a wee bit busy. Always. Which makes the traffic lights there all the more important, what with their magical traffic management capabilities. But I just sat in traffic for much longer than anticipated at that very spot. For the second time in the past month, the lights are out — blinking red, making them no better than stop signs and causing huge delays. Who knows why. Maybe it’s the construction of the Mockingbird Station expansion. Maybe it’s a conspiracy to get people to use DART. Can’t TxDot install new lights that are more reliable? Oh. Maybe not.