The Central Texas Regional Mobility Authority is about 16 percent complete as of Feb. 26 with its MoPac Improvement Project that will add one toll lane in each direction between Cesar Chavez Street and Parmer Lane. Restriping work is expected for a few more weeks, and Steve Pustelnyk, director of community relations for the project, said crews are continuing to clear trees and remove streetlights in the median areas. He said residents could see major construction on the sound walls this spring. "By late April to early May, you could see some sound walls go up," he said. In the past couple of months, drivers have experienced nightly lane closures that will continue as crews finish restriping lanes to accommodate for construction, said. Lane closures are restricted to 9 p.m.–5 a.m. Monday through Saturday and starting after 5 p.m. Sunday. The next section slated for restriping is north of US 183, but Pustelnyk said drivers likely will not see lane closures for that section until after the South by Southwest Conferences and Festivals, which will be March 7–16. This is because part of the agreement with the construction company is that nightly lane closures will not occur on holidays, the weekends of University of Texas home football games or during SXSW. Pustelnyk said the Mobility Authority had not received complaints until January about the nightly lane closures when crews had to close two lanes of traffic and the US 183 ramp to southbound MoPac. He said most complaints from the public have been about the restriping and speed limit reduction to 55 mph. To inform the public of construction work and lane closures, the Mobility Authority is using a variety of communication methods, including Twitter, the MoPac Man blog penned by Pustelnyk, its mobile app, 800AM radio station and its www.mopacexpress.com website. Pustelnyk said the challenge has been trying to get information both to residents directly affected by construction and people who live in the metro area that do not regularly travel on MoPac. The agency has put up signage to indicate when lane closures are expected and try to warn drivers that they might want to consider alternatives routes, Pustelnyk said. "[The public outreach] has gotten a lot better," said Nikelle Meade, who sits on the Mobility Authority's board of directors, adding that she loves using the app. " I want us to be thinking about where people are coming from before they access MoPac and make sure that they are warned before they even come close, and I think we've done a much better job at that." Residents can follow the Twitter account @improvemopac for alerts on lane closures. The app also provides a construction progress feature and detailed information on construction work and where it will occur. For more information, visit www.mopacexpress.com.