C-470 Corridor Project Resources

ES.0 EXECUTIVE SUMMARY (510KB)
ES.1 BACKGROUND (510KB)
ES.2 STUDY PROCESS (510KB)
ES.3 SCREENING PROCESS (501KB)
ES.4 CONCLUSION (341KB)

1.0 INTRODUCTION (204KB)
1.1 C-470 CORRIDOR HISTORY (204KB)
1.2 C-470 CORRIDOR NEEDS (204KB)

2.0 METHODOLOGY (224KB)
2.1 C-470 STUDY AREA (224KB)
2.2 STUDY GOALS AND OBJECTIVES (224KB)
2.3 STUDY APPROACH (224KB)
2.3.1 C-470 Corridor Environmental Assessment (224KB)
2.3.2 Value Engineering (VE) Study (224KB)

3.0 BACKGROUND (150KB)
3.1 COLORADO TOLLING ENTERPRISE (150KB)
3.2 MANAGED LANES (150KB)
3.2.1 Value Pricing Lanes (150KB)
3.2.2 Value Pricing Pilot Program (VPPP) (150KB)
3.2.3 Value Pricing Corridors Currently in Operation around the Country (150KB)
3.3 PUBLIC PRIVATE INITIATIVE (150KB)

4.0 EXISTING CONDITIONS (291KB)
4.1 HIGHWAY GEOMETRIC FEATURES (291KB)
4.1.1 Typical Section (291KB)
4.1.2 Horizontal Alignment (291KB)
4.1.3 Vertical Alignment (291KB)
4.1.4 Interchange and Ramp Configurations (291KB)
4.1.5 Pavement Conditions (291KB)
4.1.6 Structure Conditions (291KB)
4.1.7 Santa Fe Drive over C-470 (291KB)
4.1.8 C-470 over the Platte River (291KB)
4.1.9 Planned Transportation Improvements (291KB)
4.2 EXISTING TRAFFIC CONDITIONS (291KB)
4.2.1 Existing Average Daily Traffic Volumes (291KB)
4.2.2 Hourly Distribution (412KB)
4.2.3 Vehicle Classification (291KB)
4.2.4 Travel Time Observations (291KB)
4.2.5 Levels of Service/Densities (291KB)
4.2.6 Congestion/Queue Observations (291KB)
4.2.7 Speed Profiles (291KB)
4.2.8 Safety (291KB)

5.0 PUBLIC INVOLVEMENT (186KB)
5.1 OVERVIEW (186KB)
5.1.1 Project Management Team (186KB)
5.1.2 Technical Working Group (186KB)
5.1.3 Executive Working Group (186KB)
5.1.4 Open Houses/Workshops (186KB)
5.1.5 Newsletters (186KB)
5.1.6 Small Group Meetings (186KB)
5.1.7 Project Web site (186KB)
5.1.8 Agency Coordination/Project Stakeholders (186KB)
5.1.9 Public Acceptance (186KB)
5.2 C-470 FOCUS GROUPS (186KB)
5.3 STATED PREFERENCE SURVEY (186KB)
5.3.1 Toll Sensitivity Curves (186KB)
5.3.2 Value of Time Calculations (186KB)

6.0 FUTURE TRAFFIC CONDITIONS (346KB)
6.1.1 Average Annual Daily Traffic (346KB)
6.1.2 Peak Hours (346KB)
6.1.3 Travel Time Observations (346KB)
6.1.4 Levels of Service/Densities (346KB)
6.2 TRAFFIC MODELING (389KB)
6.2.1 Initial Toll Diversion Forecasts Using Travel Demand Model (389KB)
6.2.2 Forecasts and Traffic Operations Using Micro-simulation Model (389KB)
6.2.3 Calibration of AIMSUN Model (389KB)

7.0 PROJECT ELEMENTS (431KB)
7.1 DESIGN CONSIDERATIONS (431KB)
7.1.1 Design Criteria (431KB)
7.1.2 Key Design Issues (431KB)
7.1.3 Methods of Separation (431KB)
7.1.4 Buffer Separation (431KB)
7.1.5 Tubular Marker Posts (431KB)
7.1.6 Curb and Marker (431KB)
7.1.7 Concrete Barrier (431KB)
7.1.8 Selection of Final Typical Section (431KB)
7.1.9 Access Types (376KB)
7.1.10 Toll Collection Scheme (376KB)
7.1.11 Signing (567KB)
7.1.12 Intelligent Transportation Systems (ITS) (567KB)
7.2 COST ESTIMATES (567KB)
7.2.1 Roadway Capital Costs (567KB)
7.2.2 Toll Equipment Capital Costs (567KB)
7.2.3 Operations Costs (567KB)
7.2.4 Maintenance Costs (567KB)
7.3 FINANCIAL FEASIBILITY ANALYSIS (567KB)
7.3.1 Debt Financing Considerations (567KB)
7.3.2 Determination of Toll Structure (567KB)
7.3.3 Revenue and Feasibility Calculations (567KB)

8.0 ALTERNATIVES SCREENING (201KB)

8.1 STEP 1. CORRIDOR CAPACITY ANALYSIS (201KB)

8.1.1 Existing Conditions Analysis (201KB)

8.1.2 2025 Conditions Analysis (201KB)

8.1.3 Cursory Feasibility Assessment of I-70 to Morrison Road (201KB)

8.1.4 Four-lane Barrier Separated Concept (201KB)

8.1.5 Reversible Express Lane Concept (201KB)

8.1.6 Single Express Lane Concept (201KB)

8.1.7 Conclusions of the I-70 to Kipling Parkway Analysis (201KB)

8.1.8 Phasing Plan for Kipling Parkway to I-70 (201KB)

8.2 STEP 2. PRELIMINARY SCREENING OF ACCESS LOCATIONS (201KB)

8.3 STEP 3. QUALITATIVE SCREENING OF ACCESS LOCATIONS (201KB)

8.4 STEP 4. QUANTITATIVE SCREENING OF ACCESS LOCATIONS (201KB)

8.4.1 Access Alternatives (201KB)

8.4.2 Direct Access (575KB)

8.4.3 Fourth Level Screening Criteria (575KB)

8.4.4 Projected Traffic Volumes (575KB)

8.4.5 Interchange Reserve Capacity (575KB)

8.4.6 Geometric Constraints (575KB)

8.4.7 Express Lane and General Purpose Lane Operations (160KB)

8.4.8 Access Spacing (160KB)

8.4.9 Financial Feasibility (160KB)

8.4.10 Selection of Final Access Configuration (160KB)

9.0 OPTIMIZATION OF FINAL ALTERNATIVE (429KB)
9.1 ACCESS LOCATION REFINEMENT (429KB)
9.1.1 I-25 Interchange (429KB)
9.1.2 Quebec Street (429KB)
9.1.3 Colorado Boulevard (429KB)
9.1.4 Lucent Boulevard (429KB)
9.1.5 Wadsworth Boulevard (429KB)
9.1.6 Final Access Alternative (429KB)
9.2 FINANCIAL FEASIBILITY OF FINAL CONFIGURATION (401KB)
9.2.1 Toll Rate Optimization (401KB)
9.2.2 Roadway Design Capital Cost Estimates (401KB)
9.2.3 Toll Collection Fees (401KB)
9.2.4 Financial Feasibility of Final Configuration (401KB)
9.3 TRAFFIC OPERATIONS OF LOCAL ARTERIAL NETWORK (401KB)
9.4 ROW REQUIREMENTS (401KB)
9.5 HIGH-OCCUPANCY VECHICLE COMPONENT (401KB)
9.6 TRANSIT COMPONENT (401KB)

10.0 FUNDING PLAN (145KB)
10.1 STRATEGIES TO LEVERAGE TOLL REVENUES (145KB)
10.2 SUPPLEMENTAL FUNDING (145KB)
10.2.1 Metropolitan Planning Organization Process (145KB)
10.2.2 TABOR (145KB)

11.0 CONCLUSIONS (507KB)
11.1 PHASING PLAN (507KB)
11.2 IMPLEMENTATIO N STEPS (332KB)
11.2.1 Carry Express Lanes Alternative Forward into EA (332KB)
11.2.2 Complete Funding Package (332KB)
11.2.3 Amend RTP to Include Express Lanes Alternative (332KB)
11.2.4 Issue Design Build Contract (332KB)
11.2.5 Traffic & Revenue Study (332KB)
11.2.6 Bonding (332KB)
11.2.7 Construction (332KB)

LIST OF FIGURES
Figure ES.1 Proposed/Access Configuration (500KB)
Figure ES.2 Proposed/Phasing Plan (323KB)
Figure 1.1 Vicinity Map (197KB)
Figure 2.1 Study Area (214KB)
Figure 4.1 Existing Freeway Volume (View 1) (270KB)
Figure 4.2 Existing Freeway Volume (View 2) (380KB)
Figure 5.1 Time Saved Per Mile as Function of Cost Per Mile (145KB)
Figure 5.2 Cost Per Mile as Function of Time Saved Per Mile (129KB)
Figure 6.1 Projected AM Peak Hour Volumes (227KB)
Figure 6.2 Projected PM Peak Hour Volumes (235KB)
Figure 6.3 PM Peak Hour Travel Times (351KB)
Figure 7.1 Methods of Separation (215KB)
Figure 7.2 Typical Section (312KB)
Figure 7.3 Access Types (224KB)
Figure 7.4 Typical Toll Collection Zone (271KB)
Figure 7.5 Toll Collection Scheme (350KB)
Figure 7.6 Conceptual Signing Plan (214KB)
Figure 7.7 Example Dynamic Message Sign Sequence (215KB)
Figure 8.1 C-470 Corridor Map (167KB)
Figure 8.2 V/C Comparison – Existing (2003) (131KB)
Figure 8.3 V/C Comparison – Projected (2025) (131KB)
Figure 8.4 Access Configuration for Alternatives 1 through 10 (560KB)
Figure 9.1 I-25/C-470 Interchange (256KB)
Figure 9.2 Projected AM Peak Hour Volumes Final Configuration (659KB)
Figure 9.3 Projected PM Peak Hour Volumes Final Configuration (380kB)
Figure 9.4 Proposed Typical Section (277KB)
Figure 11.1 Proposed Final Alternative (500KB)
Figure 11.2 Potential Phasing Plan (324KB)

LIST OF TABLES
Table ES.1 Summary of Financial Feasibility Analysis (139KB)
Table 4.1 Existing Hourly Distribution (133KB)
Table 4.2 Heavy Vehicle Volumes along C-470 (133KB)
Table 4.3 Summary of AM Travel Time Observations (sec) (132KB)
Table 4.4 Summary of PM Travel Time Observations (sec) (132KB)
Table 4.5 AM/PM Peak Hour C-470 Freeway Segment LOS/Density Summary (132KB)
Table 4.6 Summary of AM Average Speed (mph) (133KB)
Table 4.7 Summary of PM Average Speed (mph) (133KB)
Table 5.1 Value of Time Summary Table (132KB)
Table 5.2 Value of Time Calculation for Corridor Users (130KB)
Table 6.1 AM/PM Peak Hour Intersection Delay and Levels of Service (139KB)
Table 6.2 AM Peak Hour Freeway Levels of Service/Density (134KB)
Table 6.3 PM Peak Hour Freeway Levels of Service/Density (134KB)
Table 7.1 Roadway Design Criteria (139KB)
Table 7.2 Roadway Capital Cost Unit Prices (133KB)
Table 7.3 Toll Equipment Capital Costs (139KB)
Table 7.4 C-470 Express Lane Operations Costs (131KB)
Table 7.5 C-470 Express Lane Maintenance Costs (132KB)
Table 7.6 Toll Rate Structure (129KB)
Table 8.1 Preliminary Access Location Screening (132KB)
Table 8.2 Qualitative Access Location Screening (146KB)
Table 8.3 Fourth Level Screening Summary (146KB)
Table 9.1 Toll Schedule Final Configuration (132KB)
Table 9.2 Financial Feasibility Analysis with 5.5% Bond Rate and
1.75 Senior Lien/ 2.19 Subordinate Lien (142KB)
Table 9.3 Financial Feasibility Analysis with 6.0% Bonding Rate and
1.75 Senior Lien/2.19 Subordinate Lien (142KB)
Table 9.4 Financial Feasibility Analysis with 5.5% Bonding Rate and
1.75 Senior Lien/2.99 Subordinate Lien (142KB)
Table 9.5 Financial Feasibility Analysis with 6.0% Bonding Rate and
1.75 Senior Lien/2.99 Subordinate Lien (142KB)
Table 10.1 Toll Revenue Leveraging Techniques (133KB)

APPENDICES
Appendix A CDOT Draft Traffic Safety Chapter
A1 Cover to Page 3 (211KB)
A2 Page 4 to 8 (336KB)
A3 Page 9 to 12 (197KB)
A4 Table 1 (821KB)
A5 Page 14 to 18 (199KB)
A6 Page 19 to 21 (172KB)
A7 Pages 22 to 23 (317KB)
A8 Page 24 to 25 (389KB)
A9 Page 26 to 27 (631KB)
A10 Page 28 to 29 (754KB)
A11 Page 30 to 32 (335KB)
A12 Detailed Accident Summary Report (49KB)
Appendix B C-470 Focus Groups Executive Summary (200KB)
Appendix C Stated Preference Survey Executive Summary (199KB)
Appendix D I-25/C-470 Conceptual Signing Layout (1,091KB)
Appendix E I-25/C-470 Interchange Design Alternatives (576KB)
Appendix F Colorado Boulevard Interchange Analysis (75KB)
Appendix G Roadway Cost Estimate for Final Alternative (67KB)
Appendix H Operational Analysis of the C-470 Ramp Complex (199KB)