JEFFERSON CITY - To help ease your summer travel planning, the Missouri Department of Transportation offers a list of high-impact work zones. Although MoDOT's construction budget is about half of what it was two years ago, drivers will encounter significant work zones as MoDOT and its contractors work to best preserve the state's transportation system with the funding that is available. "You'll notice orange signs and messages on roadside boards that provide directions to help you move safely through work zones," said MoDOT State Construction and Maintenance Engineer Dave Ahlvers.In addition to the construction areas on the list, drivers should be aware of smaller, moving operations such as mowing, minor repairs and motorist assistance. "When you see MoDOT vehicles using flashing yellow lights, we ask you to move over or slow down," said MoDOT State Maintenance Engineer Beth Wright. "We appreciate all you can do to help our coworkers make it home safely each day."Work zone location information is available up to a week in advance on MoDOT's Traveler Information Map located at www.modot.org or on the free smartphone app available in both Apple and Android app stores. Motorists can also call toll-free 1-888-ASK MoDOT (888-275-6636) to ask questions 24 hours a day. While most work zones will not be active during the Memorial Day weekend, it might be necessary for some lane closures to remain in place. NORTHWEST DISTRICTBusiness 136/Route 85 Gentry County - Grading, drainage, paving, sidewalks with ADA improvements. Route 85 closed with a detour on city streets. Construction ongoing through mid-September.U.S. 36 EastBuchanan and DeKalb counties - Roadway resurfacing approximately 10 miles from Route AC to Route 31 north. Begins May 28 and continues through mid-September.U.S. 169Buchanan and Clinton counties - Resurfacing and adding shoulders and rumble stripes from Route AC (Buchanan) to the Clay County line.NORTHEAST DISTRICTUS Route 61/South Lincoln Drive in Troy Lincoln County - Construction of a new interchange through fall 2013. One lane traffic during daytime hours.KANSAS CITY DISTRICTDowntown BridgesJackson County - Interstate 35, I-70, I-670 and the 12th Street Bridge over I-70 in the Downtown area. Bridge, ramp and lane closures will affect the I-35 corridor and access at each of the four corners of the Downtown Loop at times through mid-December. I-35/I-435/Route 69 Clay County - Interchange improvements near the Ford Assembly Plant in Claycomo will close bridges, ramps and lanes at times through early November.I-29/I-435 Bridges near KCI AirportBridge replacement work includes ramp and lane closures now through early November.I-635/Route 9/US 69 Bridges Near the City of Riverside - Several ramps will close at various times; none more than eight weeks. Now through early November.Grandview Road Bridge Jackson County - Replacement of the Grandview Road Bridge over Bannister Road (Route W) in south Kansas City. Grandview Road will close for several months and Bannister Road traffic will be restricted to one lane in each direction at times to accommodate bridge removal and replacement. Now through mid-October.CENTRAL DISTRICT Route 740 (Stadium Boulevard) Boone County - Improvements include a new interchange at I-70 and widening of Stadium Boulevard from just north of Interstate 70 to south of Broadway. Includes widening of Bernadette Drive from Knipp Street to Beverly Drive. Now through Winter 2014.Route 5Camden and Morgan counties - Resurfacing of 28 miles from Route 52 West in Versailles to the Niangua Bridge in Camden County. One lane will be closed and a pilot car and flaggers will guide motorists through the work zone. Expect slight delays. The project is scheduled to begin in July and to be completed in winter 2013.ST. LOUIS DISTRICTI-70 at the Blanchette Bridge St. Louis and St. Charles counties - crews continue to build a new bridge on westbound I-70 across the Missouri River. Traffic lanes are narrowed and shifted to three lanes in each direction. The westbound bridge will reopen by the end of August 2013.I-270 between Dougherty Ferry and I-44 St. Louis County - Construction of a fifth southbound lane on I-270. The exiting lanes are narrowed and shifted. Now through late 2013.I-64 at Tower Grove and JeffersonSt. Louis County - Replacing bridges and adding new ramps on I-64 between Tower Grove and Kingshighway. Replacement of the Jefferson Avenue bridge. Lanes are narrowed and shifted and several ramps are closed. The Jefferson Bridge project will be complete in August. The Tower Grove project will continue until mid-2014.SOUTHWEST DISTRICTI-44/Range Line Road (Bus. Loop 49) Newton County - Reconstruction of interchange, includes replacing I-44 bridges over Range Line Road and converting Range Line Road to diverging diamond interchange. Mostly nighttime lane closures on I-44 and Range Line Road. Completion: Late December 2013.SOUTHEAST DISTRICTI-55Ste. Genevieve County - Installation of high-tension guard cable on I-55 South between Route O and Route J/N. Expect daily left lane closures. Additional paving of 10 feet outside and four feet inside shoulders on I-55 North between Route O to the Jefferson Co. line. Expect daily lane closures through the summer.I-55Scott, New Madrid and Pemiscot counties - Installation of high tension guard cable from Sikeston to Arkansas. Additionally, paving of inside shoulder is underway. Motorists should expect lane closures through the summer.I-55Scott County - Asphalt resurfacing. Expect daily lane closures through the summer.