roadside design guide clear zone table 31

11 dez 2020 Sem categoria

Table 10-1A Clear Zone for 3R Projects Other Than National Highway System Technical Corrections, August 2001–February 2003 Table 3.1 [U.S. APPENDIX C EXAMPLES OF CLEAR ZONE CALCULATIONS .....13 APPENDIX D EXAMPLES OF LENGTH OF NEED CALCULATIONS.....17 GLOSSARY OF TERMS.....31. A comprehensive design process, guidance and design considerations are provided for the selection of a suitable barrier and for the lateral and longitudinal placement of barrier systems. Edition 3.1 corrects the risk score formula for rollover events in Tables B.11, B.12, B.14, B.15, B.16 and B.18. 1.9.13 Hazards for Motorcyclists and Other Vulnerable Road Users, 1.9.14 Hazards for Heavy Vehicle Occupants, 2.3 Treatment of Roads Based on Policies and Practices, 2.3.1 Treatment of Roads Based on National Practices, 2.3.2 Treatment of Roads Based on Jurisdictional Policies, 2.4 The Network Roadside Risk Intervention Threshold (NRRIT), 2.4.1 Application to Greenfield and Brownfield Sites, 2.4.3 Setting a NRRIT Based on Two-lane Undivided Rural Roads, 2.4.4 Setting a NRRIT Based on Urban Roads, 3.1 Overview of the Risk Evaluation Process, 3.2 Concepts Used in Evaluating the Risk at Particular Sites, 3.3 Step 1: Assess Against National Practices, Jurisdictional Policies and Corridor Visions, 3.4 Step 2: Compare the Risk Score with the NRRIT, 3.4.2 Examples of the Use of the Procedure, 3.5 Step 3: Identify, Evaluate and Rank Risk Mitigation Options, 3.5.2 Evaluate the Risk Associated with a Roadside Treatment Using a Qualitative Assessment, 3.5.3 Evaluate the Risk Associated with a Roadside Treatment Using a Quantitative Assessment, 3.6 Step 4: Design the Recommended Roadside Treatments, 4.4.7 Treatments for Minor Roadside Hazards, 4.4.10 Treatments at Active Controlled Level Crossings, 5.1.2 General Requirements for Road Safety Barrier Systems, 5.1.3 Road Safety Barriers for Vulnerable Road Users, 5.2 Factors Considered in Barrier Selection, 5.3.3 Determine the Objectives of the Safety Barrier (Step B2), 5.3.4 Determine the Lateral Position of the Barrier (Step B3), 5.3.12 Barrier-to-hazard Clearance (Step B4), 5.3.13 Barrier Containment Level Required (Step B5), 5.3.19 Minimum Length of Barrier (Step B12), 5.3.22 Transitions between Barriers (Step B15), 5.3.23 Confirm that the Barrier Meets the Objectives (Step B16), 5.4 General Access Through Road Safety Barriers, 5.6 Other Road Safety Barrier Design Considerations, 6.6.2 Step S1 – Determine Vehicle Entry Speed, 6.6.3 Step S2 – Evaluate Truck Stability on Approach, 6.6.5 Step S4 – Determine Type of Facility, 6.6.6 Step S5 – Determine Pavement Surface of Facility, 6.6.10 Step S9 – Design Vehicle Recovery Facilities, 6.6.12 Step S11 – Design Truck Parking Areas, Appendix B Detailed Risk Evaluation Procedure, B.3 Likelihood of Colliding with a Point Hazard and a Length of Road Safety Barrier, B.4.5 Trauma Indices for Roadside Features on Roads with Other Operating Speeds, B.5 Evaluation of Risk Associated with Vehicle Rollovers, B.7 Limitations of the Risk Assessment Process, B.10 Example 2 – Centreline Treatments on a Rural Two-lane Road, B.11 Number of Fatal and Serious injuries, Appendix C Treatment of Roads Based on Jurisdictional Policies, C.1 Installation of Barriers on Particular Road Segments, C.2 Installation of Barriers at Sites with High Consequence Infrastructure and Land, C.3 Installation of Barriers Between Adjacent Carriageways, C.4 Installation of Barriers or Other Safety Measures on Other Defined Road Types and Locations, Appendix F Treatments for Brownfield Sites, F.1.1 Treatments for Pavement Edge Drop-off, F.2.2 Treatments for Bridge Piers, Abutments, End Posts and Tunnel Portals, F.3 Barrier Placement in Constrained Situations, Appendix H Examples of Length of Need Calculations, H.4 Worked Examples to Determine Road Safety Barrier Length of Need, Appendix I Types of Safety Barrier Terminals, Appendix J Transitions between Barrier Types, J.2 Design Criteria – Physically Connected Barriers, J.3 Typical Interfaces between Barrier Types, J.7 Wire Rope Safety Barrier to Semi-rigid Barrier, J.8 Wire Rope Safety Barrier to Concrete Barrier, C1.4 Other Factors Contributing to Errant Vehicles, C6.4 Vehicle Trajectory Over Cutting Slopes, C6.5 Summary of Limitations on Barrier Location. 40 mph or less: ADT < … Table A2-1 clear Zone for 3R Projects on and... 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