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New LRRB Members
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<br />Steve Koehler
<br />Steve Koehler, City of New Ulm Engineer.
<br />is the newest member of the LRRB. Steve
<br />started his career at the City of New Ulm
<br />in 1987 as the Assistant Engineer and was
<br />appointed as City Engineer in 1994. To
<br />Steve, research is important because as
<br />every engineer involved in transportation
<br />is expected to do more with less, it is
<br />Steve Koehler increasingly important to support and utilize
<br />research as a means to identify and improve
<br />cost effective and practical methods that can be implemented to help
<br />preserve and improve our transportation system. By supporting research
<br />on a wide range of topics specific to local engineers, he feels that the
<br />LRRB offers local government an opportunity to implement research
<br />+ave a direct and practicai iocai application. Steve can
<br />ve.koehler@ci.new-uhn.mn.us or 507-359-8245
<br />Linda Taylor
<br />Linda Taylor was appointed as Mn/DOT's
<br />Director of Research Services in May 2009.
<br />Linda scarred her Mn/DOT career twenty-
<br />seven years ago and has worked in a variety
<br />of engineering functional areas: Bridge,
<br />Traffic, Freeway Operations. ITS, Technical
<br />Services, and Maintenance. Throughout her
<br />career. research has played an integral and
<br />important role in every position. Linda
<br />Lirtda Taylor is actively involved in several research
<br />committees including: LRR$. LTAP
<br />Steerine Committee, NATRSL Technical Advisory Committee, and
<br />CTS Research Councils. Research is very important to Linda because
<br />it provides a mechanism to explore innovative, new approaches for
<br />addressing department needs that align with department strategic plan.
<br />Linda thinks that as agencies face budget shortfalls, research must focus
<br />on providing end user products that improve efficiency, save resources,
<br />improve processes and provide guidance. Linda can be reached at
<br />linda.taylor@ dotstate.mn.us or 651-366-3765
<br />POSTAGE WILL BE PAID BY:
<br />Minnesota Local Road Research Board
<br />Research Services Section
<br />Minnesota Department of Transportation
<br />395 John Ireland Blvd., MS 330
<br />RETURN SERVICE REQUESTED
<br />Duane Schwartz
<br />City of Roseville/Public Works Director
<br />2660 Civic Center Drive
<br />Roseville, MN 55113
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<br />hest Pracfices f®r usf ®nfr®I ®n
<br />Aggregate ®ads
<br />Nearly half of the roadway miles in the U.S. are gravel roads.
<br />The dust caused by gavel roads can affect the quality of
<br />life of nearby residents. This dust can also cause impaired
<br />vision, especially on narrow roads or at intersections and
<br />railroad crossings. Since paving the roads is a significant
<br />investment, maintenance becomes extremely important. A
<br />study was completed to evaluate the effectiveness of calcium
<br />chloride, magnesium chloride and organic polymer-plus-
<br />binder treatments.
<br />Researchers selected 51 test sections in Minnesota with daily
<br />traffic volumes from 25 to 700 vehicles. Test materials were
<br />applied once during the first year, with applications varying
<br />the second year. Overall, the. treatments lowered dust levels.
<br />which improved visibility, air quality and safety conditions
<br />nn ~r;tvFl roads. MaQnesinr.? chloride and r;t
<br />treatments were equally effective, and more efi
<br />organic polymer-plus-binder. Generally applicat
<br />last 100 to 150 days;
<br />with 200 days being ~ ~ "~ t~ _~.`
<br />the maximum time ~,~; ~"'
<br />that a treated road '` " ~ ~"
<br />will have noticeably ,,,, ,~
<br />Tess dust.In addition,
<br />dust was more '~ ~`
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<br />effectively reduced -:,
<br />when applied to
<br />gravels containing
<br />greater amounts of fine aggregates. However, treatments on
<br />gravel containing higher levels of sand were less effective.
<br />The treatments reduced the need for grading and the frequency
<br />of gravel replenishment.
<br />LRRB Report Number: 2009-04 (0.2 MB)
<br />n +iv~.Ir-rb.orglpctf/200904.pttf.
<br />Principal Investigator: Eddie Johnson
<br />eddie.johnson @dotstate.mn.us
<br />651-366-5465
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