SPEED STUDIES - CTH DL AND CTH V

MSA Professional Services, Inc. (MSA) is pleased to have the opportunity to propose on the Traffic Speed Studies along CTH DL and CTH V in Sauk County.
MSA has experience completing speed studies for communities throughout Wisconsin, including recently completed studies for the Green Lake County Highway Department and the Wisconsin Department of Transportation (WisDOT) – SW Region. MSA has also completed several ‘spot’ safety reviews for other County Highway departments ranging from sight distance assessments to signage and pavement marking recommendations and geometric improvements. This experience with both speed studies and roadway safety reviews sets MSA up well to assist the Highway Department with the review of speeds while taking into consideration the safety impacts for all modes of transportation.The scope of work below is intended to provide the County the necessary information to establish a speed
limit that is in compliance with state statutes and is enforceable to the traveling public.
SCOPE OF WORK
MSA proposes to complete the following tasks described below based off requirements discussed in
WisDOT’s Traffic Engineering, Operations & Safety Manual, Chapter 13, Section 5, Speed Limits. This
document references two likely criteria for county trunk highway roads:
(1) For CTH roads, the Fixed Limits per State Statute 346.57(4) is 55 mph and
(2) 35 mph for semi-urban districts outside the corporate limits of a city or village.
The state statutes allow the local governing authority the ability to lower the speed limit by 10 mph prior to requiring WisDOT approval. The guidelines state, “All speed limit changes shall be based on a traffic engineering study, including modifications allowed under State Statute. Local governments can implement speed limit changes on the local road system without WisDOT approval when proposals are within the constraints identified above.”