Traffic Control ​

DOTD uses an integrated, systematic and performance based approach to traffic engineering.  For our intersection control evaulation policy, please see EDSM VI.1.1.2 Intersection Control Evaluation (ICE) Requirements.  

The following definitions are provided for clarification purposes: 
  • ​​​​​​​​Traffic Signal Upgrade:  Work which involves any one of the following for non-emergency purposes; the installation of a new controller and cabinet, rewiring the entire signal, installing all new poles or changing the layout of the signal.
  • Restricted Crossing U-Turn (RCUT):  Intersection is defined as a non-traditional intersection system that utilizes a combination of one partial median opening and two directional median openings.  This type of intersection is typically the crossing of major and minor arterials where the left turn moves are relatively high.  The openings must be appropriately spaced with one directional u-turn opening or one partial median opening on each side of the partial median opening.  The distance between two of these systems is also critical.  The intersection and u-turns may be unsignalized or signalized, depending on volumes.  
  • Median U-Turn (MUT) Intersection:  Intersection is defined as the use of two or four directional u-turn openings, placed on each side of an intersection, combined with the prohibition of all left turns at the intersection.  This type of intersection is typically the crossing of two major arterials where the through move is heavier than the left turns. All through movements and right turns at the intersection are permitted.  The openings must be appropriately spaced with one directional median opening on each side of the partial median opening.  The distance between two of these treatments is also critical.  The main intersection is typically signalized and the u-turns may be unsignalized or signalized, depending on volumes.   
  • ​Full Access Traffic Signal:  A traffic signal where all approaches are allowed to turn left out and left in.

​​​​​​​

Signal Resources

  
  
  
  
Folder: TSI Version 3.2 - 07.01.20TSI Version 3.2 - 07.01.207/1/2020 8:35 AM
Bolinger_-_Traffic_Signal_Controller_Certification.pdfBolinger_-_Traffic_Signal_Controller_Certification12/14/2013 2:29 PM2020 KB
Left Turn Signals Brochure.pdfLeft Turn Signals Brochure12/14/2013 2:30 PM425 KB
Mast Arm Table.docMast Arm Table12/14/2013 2:31 PM50 KB
Railroad Preemption Worksheet.pdfRailroad Preemption Worksheet12/14/2013 2:32 PM19 KB
Railroad Preemption Worksheet.xlsRailroad Preemption Worksheet12/14/2013 2:33 PM51 KB
Traffic Signal Details Link (FOR INFORMATIONAL PURPOSES ONLY).aspxTraffic Signal Details Link (FOR INFORMATIONAL PURPOSES ONLY)12/14/2013 5:46 PM2 KB
Traffic Signal Controller Certification 2016.pdfTraffic Signal Controller Certification 20168/24/2016 9:58 AM2104 KB
Traffic Signal Manual V3 - 7.1.20.pdfTraffic Signal Manual V3 - 7.1.207/1/2020 9:20 AM14354 KB

Photo Enforcement 

​​​Traffic Enforcement Systems For Local Governments

  
  
  
  
A - Traffic Enforcement Systems Policy with cover letter signed by Chief Engineer.pdfA - Traffic Enforcement Systems Policy with cover letter signed by Chief Engineer12/14/2013 2:32 PM1008 KB
A1 - Guide.pdfA1 - Guide12/14/2013 2:33 PM314 KB
B - Permitting Process Flow Chart.pdfB - Permitting Process Flow Chart12/14/2013 2:34 PM242 KB
C - Potential Permit Location Request.pdfC - Potential Permit Location Request12/14/2013 2:35 PM59 KB
D - Example Engineering  Report.pdfD - Example Engineering Report12/14/2013 2:36 PM2574 KB
E - Previously Attempted Red Light Running Countermeasures Checklist.pdfE - Previously Attempted Red Light Running Countermeasures Checklist12/14/2013 2:37 PM96 KB
F - Making Intersections Safer title sheet.pdfF - Making Intersections Safer title sheet12/14/2013 2:37 PM130 KB
G - Countermeasure to Reduce Speeding.pdfG - Countermeasure to Reduce Speeding3/10/2017 8:33 AM1146 KB

Chief Engineer Orders​

 

This page has content that is only viewable by logging onto the web site.

 

​​​​
​​​​​