A buckled segment of road on North Commerce Street was likely due to last week’s extreme heat.
The bump got some attention on social media throughout the week, but so far, no more have been reported. The pavement has been patched up, but will still need to be repaired. City Engineer Thomas Mansur said aside from the pavement in front of Sonic, he hasn’t gotten any recent reports of buckled or damaged concrete in Ardmore.
“If you see pavement buckling like [this one], that was clearly heat-related,” Mansur said. “When you get up to 105 degrees, your pavement can go to 140 or 160 degrees.”
Mansur said sudden spikes in temperature are more likely to cause buckling. Rapid cooling, on the other hand, can cause cracks. Occasionally, two segments of pavement will expand due to heat, causing cracks in both slabs.
“It’s not unusual in the summer, particularly for concrete pavements,” Mansur said.
Mansur said buckling isn’t a symptom of age. Building methods have improved over the last 60 years, but well-placed concrete only gets harder over time.
“Theoretically, it will continue to strengthen,” Mansur said.
 He said Highway 77 is the state’s responsibility to maintain, not the city’s.
“The city, along state highways, is responsible for maintaining everything else,” Mansur said. “Basically, they own the intersections, we own the stoplights.”  
Mansur said the city would only step in to repair a state highway in an emergency situation. If a city sewer line under a state highway needs to be repaired, the city can remove the pavement to reach it as long as they replace it.
“We had some pavement buckle out on Broadway about six weeks ago,” Mansur said. “We went out and were able to fix that.”