According to Houston Transtar, these are the road, lane and ramp closures that drivers should be aware of this weekend, Feb. 16-18. 1) The West Loop 610 southbound exit ramp to Fournace Place will be closed for construction until Aug. 15 at 5 a.m. 2) The South Sam Houston Tollway entrance ramp at FM 865 will be closed continuously until March 31 at 5 a.m. 3) The I-45 northbound connector ramp to Hwy. 59 North will be closed for construction until June 1 at 5 a.m. 4) The I-45 northbound and southbound mainlanes and frontage road will be closed from FM 518 to FM 517 in League City until Feb. 24 at 3 p.m.