Construction on the extension of Holderrieth Road between Calvert Road and Hwy. 249 began Jan. 29. The $6 million project funded by Harris County includes extending the four-lane concrete boulevard with appropriate drainage. Estimated timeline: Jan. 29-Nov.  25 A $108,688 project to install a traffic signal at Spring Stuebner Road and Greengate Drive was completed by Harris County Precinct 4 on April 16. Estimated timeline: Feb. 26-April 16