NORTH DAKOTA DEPARTMENT OF TRANS Pavement Preservation A

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NORTH DAKOTA DEPARTMENT OF TRANS. Pavement Preservation A strategic approach to managing transportation infrastructure

NORTH DAKOTA DEPARTMENT OF TRANS. Pavement Preservation A strategic approach to managing transportation infrastructure 3/10/2021 New Design Guidelines 1

NORTH DAKOTA DEPARTMENT OF TRANS. Pavement Preservation n n NDDOT Mission/Goals Background/Need n n

NORTH DAKOTA DEPARTMENT OF TRANS. Pavement Preservation n n NDDOT Mission/Goals Background/Need n n Reasons Highway Investment Strategies Design Guidelines Statewide Safety Program 3/10/2021 New Design Guidelines 2

NDDOT MISSION/GOALS n NDDOT MISSION n n Provide a transportation system that safely moves

NDDOT MISSION/GOALS n NDDOT MISSION n n Provide a transportation system that safely moves people and goods. GOALS n n n Enhance customer satisfaction Increase safety on North Dakota’s transportation system and within the Department of transportation. Improve the quality and efficiency of North Dakota’s transportation system and services. Enhance employee effectiveness and well-being. Strengthen stakeholder relationships. 3/10/2021 New Design Guidelines 3

Background/Need n n 8411 centerline miles of roadway 70% of the vehicle miles traveled

Background/Need n n 8411 centerline miles of roadway 70% of the vehicle miles traveled n n n Interstate Interregional system 14. 2% of the vehicle miles traveled n State Corridor system 3/10/2021 New Design Guidelines 4

Background/Need n n n From 1989 to 2000, 2400 miles of the low load

Background/Need n n n From 1989 to 2000, 2400 miles of the low load system has only received routine maintenance A number of these roads are still in fair condition Inadequate funding for major rehab or reconstruction of 2400 miles of roadway. 3/10/2021 New Design Guidelines 5

Background/Need n Survey said: n n n Improve ride Improve load carrying capacity 2006

Background/Need n Survey said: n n n Improve ride Improve load carrying capacity 2006 PMS data n 33% of the highway system is deficient in ride, distress or load carrying capacity. 3/10/2021 New Design Guidelines 6

Background/Need n The Right Treatment – n n n To The Right Road –

Background/Need n The Right Treatment – n n n To The Right Road – n n n Apply correct treatment to extend the service life of the roadway Improve performance and safety PMS identify, DE’s confirm At The Right Time – n Before there is significant pavement damage. 3/10/2021 New Design Guidelines 7

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 8

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 8

Highway Performance Classification System 3/10/2021 New Design Guidelines 9

Highway Performance Classification System 3/10/2021 New Design Guidelines 9

HPCS Concepts n 5 Systems with various levels of performance in areas of: n

HPCS Concepts n 5 Systems with various levels of performance in areas of: n n Ride & Distress Load Capacity Access Allowable Work Types 3/10/2021 New Design Guidelines 10

HPCS Categories n Interstate n Ride & Distress – Strive for an excellent Ride

HPCS Categories n Interstate n Ride & Distress – Strive for an excellent Ride n Load Capacity – no load restrictions n Access – Controlled access n Allowable Work Types – all types of construction are typically allowed 3/10/2021 New Design Guidelines 11

HPCS Categories n Inter-regional System n n n Similar performance as interstate except for

HPCS Categories n Inter-regional System n n n Similar performance as interstate except for controlled access Ride & Distress – Strive to maintain an excellent Ride Load Capacity – Legal Weight (Year round) Access – Sections may have partially controlled access Allowable Work Types – all types of construction are typically allowed 3/10/2021 New Design Guidelines 12

HPCS Categories n State Corridor n n n Ride & Distress – Strive to

HPCS Categories n State Corridor n n n Ride & Distress – Strive to maintain a good to excellent Load Capacity – No Load Restrictions Access – no type of control is targeted n n n On as needed basis for safety Shoulder type – gravel except for higher volume NHS segments Allowable Work Types – all types of construction are typically allowed 3/10/2021 New Design Guidelines 13

HPCS Notes n Interstate, Inter-regional & State Corridors n Have 52% of mileage n

HPCS Notes n Interstate, Inter-regional & State Corridors n Have 52% of mileage n Carry 84% of VMT n Carry 84% of Truck VMT n Carry 89% of the ESAL VMT 3/10/2021 New Design Guidelines 14

HPCS Categories n District Corridors n Ride & Distress – Strive to maintain a

HPCS Categories n District Corridors n Ride & Distress – Strive to maintain a Good Ride n Load Restriction– 8 Ton for NHS, 7 Ton (Spring ONLY) Non-NHS n Access – No access control level is targeted n Shoulder Type – gravel except for higher volume NHS routes n Allowable Work Types – primarily preventive maintenance or surface rehabilitation. 3/10/2021 New Design Guidelines 15

HPCS Categories n District Collector n Ride & Distress – Strive to maintain a

HPCS Categories n District Collector n Ride & Distress – Strive to maintain a good Ride n Load Restriction – 7 Ton or 6 Ton (Spring ONLY) n Access – No access control level is targeted n Shoulder Type - gravel n Allowable Work Types – primarily preventive maintenance or surface rehabilitation. n Note: These routes carry 2. 5% of the ESAL VMT & 4. 1% of VMT 3/10/2021 New Design Guidelines 16

3/10/2021 New Design Guidelines 17

3/10/2021 New Design Guidelines 17

3/10/2021 New Design Guidelines 18

3/10/2021 New Design Guidelines 18

HPCS Legislative Backlog/Cost Analysis Component Estimated Cost Pavements Ride Distress Load $218 Million $

HPCS Legislative Backlog/Cost Analysis Component Estimated Cost Pavements Ride Distress Load $218 Million $ 31. 9 Million $138. 8 Million Geometrics Shoulder Widen $214. 4 Million Widening for Overlays $ 22. 7 Million Vertical Clearance Interstate Non-Interstate 3/10/2021 $ 9. 9 Million $ 22. 0 Million New Design Guidelines 19

3/10/2021 New Design Guidelines 20

3/10/2021 New Design Guidelines 20

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 21

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 21

Investment Strategy n n Implemented in 1999, Revised 2007 Intent of Program n n

Investment Strategy n n Implemented in 1999, Revised 2007 Intent of Program n n n Change Prioritizing of Projects from Worst. First to a prioritization of candidates by Work-Type Create a Balanced Program by Work Type Create an optimal investment strategy 3/10/2021 New Design Guidelines 22

Investment Strategy n Optimal Funding n n n Interstate System 45. 0% Interregional System

Investment Strategy n Optimal Funding n n n Interstate System 45. 0% Interregional System 20. 0% State Corridor System 12. 5% District Corridor System 17. 5% District Collector System 5. 0% 3/10/2021 New Design Guidelines 23

Investment Strategy n Investment categories n n n Interstate System Interregional System State Corridor,

Investment Strategy n Investment categories n n n Interstate System Interregional System State Corridor, District Collector Systems 3/10/2021 New Design Guidelines 24

Investment Strategy Cont’d. 3/10/2021 New Design Guidelines 25

Investment Strategy Cont’d. 3/10/2021 New Design Guidelines 25

Types of Work n n PREVENTIVE MAINTENANCE The purpose of the Preventive Maintenance program

Types of Work n n PREVENTIVE MAINTENANCE The purpose of the Preventive Maintenance program is to protect the pavement structure, slow the rate of pavement deterioration and/or correct pavement surface deficiencies. Surface treatments used for preventive maintenance are targeted at pavement surface defects primarily caused by the environment and by the daily wear and tear of traffic. Structural deficiencies caused by traffic loading are not corrected by using these treatments. 3/10/2021 New Design Guidelines 26

Types of Work n Examples of Preventive Maintenance treatments are: n n n Crack

Types of Work n Examples of Preventive Maintenance treatments are: n n n Crack Pouring, Route and Seal, Seal Coats, Micro-Surfacing, Asphalt Overlay 2” Max, Repair of depressed cracks, Minor CPR (< 10% pavement surface area per mile), DBR Diamond Grinding, Pavement Marking, Painting Structures, etc. 3/10/2021 New Design Guidelines 27

Types of Work n n MINOR REHABILITATION A planned strategy to extend the useful

Types of Work n n MINOR REHABILITATION A planned strategy to extend the useful life of a highway by restoring the pavement structure without necessarily improving existing geometrics. The minor rehabilitation of roadways will use repair techniques designed to repair pavement distress areas primarily caused by the environment and by the daily wear and tear of traffic. A minor rehabilitation strategy will restore the load carrying capacity to its original condition. 3/10/2021 New Design Guidelines 28

Types of Work n Examples of Minor Rehabilitation treatments are: n n n n

Types of Work n Examples of Minor Rehabilitation treatments are: n n n n n Asphalt Overlay, Distress Area Repairs and Asphalt Overlay Mill & Overlay, CIR, Minor sliver grading to correct inslope Bridge Approach Repair, Bridge Rail Repair, Deck Overlay, Guardrail, etc. 3/10/2021 New Design Guidelines 29

Types of Work n n STRUCTURAL IMPROVEMENTS A planned strategy to extend the useful

Types of Work n n STRUCTURAL IMPROVEMENTS A planned strategy to extend the useful life of a highway by restoring the pavement structure without necessarily improving existing geometrics. A structural improvement will increase the load carrying capacity to meet the HPCS guidelines. 3/10/2021 New Design Guidelines 30

Types of Work n Examples of Structural Improvement treatments are: n Asphalt Overlay in

Types of Work n Examples of Structural Improvement treatments are: n Asphalt Overlay in excess of 3”, n White topping 3/10/2021 New Design Guidelines 31

Types of Work n n MAJOR REHABILITATION A planned strategy in which major work

Types of Work n n MAJOR REHABILITATION A planned strategy in which major work is performed to bring a highway up to an acceptable condition to extend the service life and provide operational improvements (i. e. adding turn lanes). 3/10/2021 New Design Guidelines 32

Types of Work n Examples of Major Rehabilitation treatments are: n Mine and Blend

Types of Work n Examples of Major Rehabilitation treatments are: n Mine and Blend and HBP n Full Depth Reclamation (FDR) n Major Concrete Pavement Repair n n (> 10% of the surface area per mile) Crack and Seat and HBP 3/10/2021 New Design Guidelines 33

Types of Work n n NEW/RECONSTRUCTION Defined as a planned strategy in which a

Types of Work n n NEW/RECONSTRUCTION Defined as a planned strategy in which a new road is constructed. This work may include work items such as relocating an existing route on new alignment, or completely removing the old pavement structure and restoring the roadbed and surfacing, or major widening on an existing roadway to increase traffic capacity (excludes realigning horizontal curves). 3/10/2021 New Design Guidelines 34

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 35

NDDOT Highway Program + + 3/10/2021 New Design Guidelines @#!% Rules 35

Design Guidelines Signed by NDDOT and FHWA the week of March 19, 2007. 3/10/2021

Design Guidelines Signed by NDDOT and FHWA the week of March 19, 2007. 3/10/2021 New Design Guidelines 36

Design Guidelines n Cover n Design Guidelines n n Implementation plan Statewide Safety Program

Design Guidelines n Cover n Design Guidelines n n Implementation plan Statewide Safety Program n 3/10/2021 Implementation plan New Design Guidelines 37

Design Guidelines n n Guidelines shown are recommended minimums, evaluate each project. Not to

Design Guidelines n n Guidelines shown are recommended minimums, evaluate each project. Not to reduce widths District Corridor on NHS design to State Corridor Forecast Traffic volumes + 10% 3/10/2021 New Design Guidelines 38

Design Guidelines n Design Guidelines common to Preventive Maintenance, Minor Rehab: n n Use

Design Guidelines n Design Guidelines common to Preventive Maintenance, Minor Rehab: n n Use current ADT Maintain existing n n n Super elevation Driving Lane Cross slope Horizontal Curvature Vertical Curvature Safety issues are part of Statewide Safety Program unless there is an identified need. Roadway Width, Use appropriate width to meet NDDOT guidelines. 3/10/2021 New Design Guidelines 39

Design Guidelines n Design Guidelines common to Preventive Maintenance, Minor Rehab (Continue): n n

Design Guidelines n Design Guidelines common to Preventive Maintenance, Minor Rehab (Continue): n n ADA improvement will be considered and included in the Environmental Document Signage n Should meet MUTCD if engineering judgment indicates n n n One compliant device could cause driver confusion Replacement of whole series can be achieved Use posted speed limit 3/10/2021 New Design Guidelines 40

Design Guidelines n Minor Rehabilitation: n n Inslope, If proposed inslope is < 3:

Design Guidelines n Minor Rehabilitation: n n Inslope, If proposed inslope is < 3: 1 consider cost effective treatment. In fill sections where the inslope breaks to < 3: 1 outside the clear zone a 4: 1 inslope should be used in the clear zone. Safety items, Safety hardware < NCHRP 230 standards upgrade to NCHRP 350 standards. 3/10/2021 New Design Guidelines 41

Design Guidelines n Structural Improvement: n n n ADT 20 year projection Super elevation

Design Guidelines n Structural Improvement: n n n ADT 20 year projection Super elevation – Attempt to correct if cost effective Driving Lane Cross slopes: n n n HBP over Asphalt 2. 1% HBP over concrete 1. 5% - 2. 5% Horizontal curve: Sign deficient Vertical curve: existing Clear Zone: 20’ 3/10/2021 New Design Guidelines 42

Design Guidelines n Structural Improvement (continue): n Roadway Shoulder Cross slopes: n n n

Design Guidelines n Structural Improvement (continue): n Roadway Shoulder Cross slopes: n n n n HBP over Asphalt 8. 0% Max. HBP over concrete, Non- Interstate 8. 0% Max HBP over concrete, Interstate 6. 0% Max Safety items, Safety hardware < NCHRP 230 standards upgrade to NCHRP 350 standards. Replace Mailbox supports ADA improvement will be considered and included in the Environmental Document Regulatory and warning signs and pavement markings to MUTCD 3/10/2021 New Design Guidelines 43

Design Guidelines n Major Rehabilitation: n n ADT 20 year projection Super elevations, Correct

Design Guidelines n Major Rehabilitation: n n ADT 20 year projection Super elevations, Correct to NDDOT standards. Use posted speed limit Cross Slope, Driving lanes 1. 5% - 2. 5%, Shoulder 6% max. 3/10/2021 New Design Guidelines 44

Design Guidelines n Major Rehabilitation (continued): n Horizontal Curvature, Use existing, sign when less

Design Guidelines n Major Rehabilitation (continued): n Horizontal Curvature, Use existing, sign when less than posted speed. On State and Interregional Corridors with ADT >750, if existing horizontal curvature is designed for less than 15 mph less than the posted speed make cost effective improvement or sign accordingly. 3/10/2021 New Design Guidelines 45

Design Guidelines n Major Rehabilitation (continued): n Interregional System: n 3/10/2021 Vertical Curvature, Maintain

Design Guidelines n Major Rehabilitation (continued): n Interregional System: n 3/10/2021 Vertical Curvature, Maintain existing except when ADT > 2000 then use stopping sight distance for crests and comfort for sag curves. Decision sight distance should be considered in areas where complex driver decisions are required such as intersections, overhead grade separations, lane drops or additions, etc. Passing areas should be provided at reasonable intervals based on terrain and traffic volumes. A rule of thumb would be a passing area every 3 - 5 when the ADT < 2000 and every 3 miles when the ADT > 2000. New Design Guidelines 46

Design Guidelines n Major Rehabilitation (continued): n State Corridor, District Corridor and Collector n

Design Guidelines n Major Rehabilitation (continued): n State Corridor, District Corridor and Collector n 3/10/2021 Vertical Curvature, ADT < 2000, existing vertical curves should meet a design speed of no less than 20 mph below the overall project design speed. ADT > 2000 then use stopping sight distance for crest curve design and comfort curve design for sag curves. Passing areas should be provided at reasonable intervals based on terrain and traffic volumes. A rule of thumb would be a passing area every 3 - 5 when the ADT < 2000 and every 3 miles when the ADT > 2000. New Design Guidelines 47

Design Guidelines n Major Rehabilitation (continued): n n Clear Zone, Upgrade safety work to

Design Guidelines n Major Rehabilitation (continued): n n Clear Zone, Upgrade safety work to 20’ clear zone except when ADT > 2000 use AASHTO roadside design clear zone. Inslope, 4: 1 minimum, on Interregional system > 2000 ADT a 6: 1 inslope is desirable where grading or roadway widening is required. Pavement Slough, Use NDDOT shoulder treatment methods. Safety items, Upgrade safety hardware to meet NCHRP 350 standards. 3/10/2021 New Design Guidelines 48

Design Guidelines n Major Rehabilitation (continued): n n n Regulatory and warning signs and

Design Guidelines n Major Rehabilitation (continued): n n n Regulatory and warning signs and pavement markings to MUTCD Perform crash analysis and address cost effective enhancements Safety items, Upgrade safety hardware to meet NCHRP 350 standards. 3/10/2021 New Design Guidelines 49

Design Guidelines n New/Reconstruction n n n ADT 20 year projection Super elevations, Horizontal

Design Guidelines n New/Reconstruction n n n ADT 20 year projection Super elevations, Horizontal curves, clear zones pavement slough - AASHTO Use posted speed limit Cross Slope, Driving lanes 1. 5% - 2. 5%, Shoulder 6% max. Construct to AASHTO guidelines w/all safety work. Upgrade safety hardware to meet NCHRP 350 standards. 3/10/2021 New Design Guidelines 50

Design Guidelines n New/Reconstruction (continue) n Inslope n n Use 4: 1 Except 6:

Design Guidelines n New/Reconstruction (continue) n Inslope n n Use 4: 1 Except 6: 1 on Interregional system > 2000 ADT and Interstate ADA will be addressed Regulatory and warning signs and pavement markings to MUTCD 3/10/2021 New Design Guidelines 51

Design Guidelines n New/Reconstruction (continue) n Interregional System: n 3/10/2021 Vertical Curvature, Maintain existing

Design Guidelines n New/Reconstruction (continue) n Interregional System: n 3/10/2021 Vertical Curvature, Maintain existing except when ADT > 2000 then use stopping sight distance for crests and comfort for sag curves. Decision sight distance should be considered in areas where complex driver decisions are required such as intersections, overhead grade separations, lane drops or additions, etc. Passing areas should be provided at reasonable intervals based on terrain and traffic volumes. A rule of thumb would be a passing area every 3 - 5 when the ADT < 2000 and every 3 miles when the ADT > 2000. New Design Guidelines 52

Design Guidelines n New/Reconstruction (continue) n State Corridor, District Corridor and Collector n 3/10/2021

Design Guidelines n New/Reconstruction (continue) n State Corridor, District Corridor and Collector n 3/10/2021 Vertical Curvature, Use stopping sight distance for crest curve design and comfort curve design for sag curves. Passing areas should be provided at reasonable intervals based on terrain and traffic volumes. A rule of thumb would be a passing area every 3 - 5 when the ADT < 2000 and every 3 miles when the ADT > 2000. New Design Guidelines 53

Design Guidelines Interstate 0 -400 + 10% 400 -750+ 10% 750 -1500+ 10% New

Design Guidelines Interstate 0 -400 + 10% 400 -750+ 10% 750 -1500+ 10% New / Recon. AASHTO Major Rehabilitation AASHTO AASHTO Structural Improvement Maint. Ex. Minor Rehabilitation Maint. Ex. PM Maint. Ex. 3/10/2021 New Design Guidelines 15002000+ 10% 2000+ AASHTO 54

Design Guidelines Interregional 4 - lane 0 -400 + 10% 400 -750+ 10% 750

Design Guidelines Interregional 4 - lane 0 -400 + 10% 400 -750+ 10% 750 -1500+ 10% 15002000+ 10% New / Recon. AASHTO AASHTO Major Rehabilitation 36 36 36 Structural Improvement 32 32 32 Minor Rehabilitation 32 32 32 PM 31 31 31 3/10/2021 New Design Guidelines 2000+ 55

Design Guidelines Interregional 2 – Lane 0 -400 + 10% 400 -750+ 10% 750

Design Guidelines Interregional 2 – Lane 0 -400 + 10% 400 -750+ 10% 750 -1500+ 10% New / Reconstruction 32 36 36 36 40 Major Rehabilitation 30 30 36 36 36 Structural Improvement 26 26 28 30 32 Minor Rehabilitation 26 26 28 30 32 PM 26 26 28 28 30 3/10/2021 New Design Guidelines 15002000+ 10% 2000+ 56

Design Guidelines State Corridor 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500

Design Guidelines State Corridor 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500 -2000+ 10% 2000+ New / Reconstruction 32 36 36 36 40 Major Rehabilitation *28 *32 36 36 Structural Improvement 24 24 28 28 32 Minor Rehabilitation 24 24 26 28 32 PM 24 24 26 26 28 3/10/2021 New Design Guidelines 57

Design Guidelines District Corridor 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500

Design Guidelines District Corridor 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500 -2000+ 10% 2000+ New / Reconstruction 32 36 36 36 40 Major Rehabilitation *26 *28 *30 32 36 Structural Improvement 22 24 26 26 28 Minor Rehabilitation 22 24 26 26 28 PM 22 24 24 26 26 3/10/2021 New Design Guidelines 58

Design Guidelines District Collector 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500

Design Guidelines District Collector 0 -400+ 10% 400 -750+ 10% 750 -1500+ 10% 1500 -2000+ 10% 2000+ New / Reconstruction 32 36 36 36 40 Major Rehabilitation *26 *28 30 30 Structural Improvement 22 22 24 26 26 Minor Rehabilitation 22 22 24 26 26 PM 22 22 24 26 26 3/10/2021 New Design Guidelines 59

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 60

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 60

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 61

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 61

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 62

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 62

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 63

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 63

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 64

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 64

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 65

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 65

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 66

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 66

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 67

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 67

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 68

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 68

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 69

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 69

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 70

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 70

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 71

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 71

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 72

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 72

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 73

Design Guidelines (Shoulder and Slough) 3/10/2021 New Design Guidelines 73

Statewide Safety Program n n n STATEWIDE SAFETY PROGRAM Is a program that is

Statewide Safety Program n n n STATEWIDE SAFETY PROGRAM Is a program that is being develop to help focus improvements in areas where there are identified needs. It is a comprehensive look at safety which will consist of four different types of analysis. The hope is to make safety improvements where they are needed or by feature type. 3/10/2021 New Design Guidelines 74

Statewide Safety Program n Statewide Safety program analysis consist of: n Critical Rate analysis

Statewide Safety Program n Statewide Safety program analysis consist of: n Critical Rate analysis n High Crash Analysis n Project level Analysis n Strategic Highway Safety Plan 3/10/2021 New Design Guidelines 75

Statewide Safety Program 3/10/2021 New Design Guidelines 76

Statewide Safety Program 3/10/2021 New Design Guidelines 76

Statewide Safety Program 3/10/2021 New Design Guidelines 77

Statewide Safety Program 3/10/2021 New Design Guidelines 77

Statewide Safety Program n High Crash Analysis n n Yearly basis on the entire

Statewide Safety Program n High Crash Analysis n n Yearly basis on the entire system Project Level Analysis (Structural Improvement, Major Rehabilitation, New Construction) n n Project review for cost effective counter measures or by engineering judgment determination Strategic Highway Safety Plan (Structural Improvement, Major Rehabilitation, New Construction) n Project review for cost effective counter measures related to SHSP emphasis areas. 3/10/2021 New Design Guidelines 78

Implementation Plan n n Effective March 26, 2007 Scoping Document n n Design Manual

Implementation Plan n n Effective March 26, 2007 Scoping Document n n Design Manual n n Identifies investment strategy Will be updated On going project n PCR complete do not implement 3/10/2021 New Design Guidelines 79

Changes Coming/Clarifications n www. dot. nd. gov/designmanual. html n n n New Design Guidelines

Changes Coming/Clarifications n www. dot. nd. gov/designmanual. html n n n New Design Guidelines Guideline Revisions Revision # Ex-Plan Bridge Widths 230 -350 Guidance 3/10/2021 New Design Guidelines 80