Section 1: Interchange Analysis Checklist
Interchange Analysis Checklist – ICE (See Chapter 10, Appendix K for sample reports)
Chapter 10, Appendix K
for sample reports)Basic informational elements usually necessary or helpful to complete
ICE Stage 1
include:
- Location, Context, Roadway Functional Classification, and Project Description
- Traffic Data (AADT, DHV, vehicle classification, percent trucks)
- Basic Roadway Characteristics (geometric elements, existing traffic control devices, pedestrian or bicycle features, unique conditions, or constraints, etc.) obtained from roadway inventory or online mapping.
- Pedestrian and bicycle information, such as activity, volumes, generators, etc. (when available)
- Existing Safety Performance
- Long‐term (minimum 5 years) crash history summary and diagram for intersection(s) under study
- If available, findings and recommendations from a previously completed Road Safety Audit or other expressed safety concerns about the location(s), such as feedback from the local maintenance office or the public.
- Connection to the emphasis areas, goals or strategies included in the latest Texas SHSP https://www.texasshsp.com/. Specifically, describe how the project addresses the Serious Crash Type – Intersection Safety emphasis area.
Elements required for
Stage 2
(for each of the short-listed Stage 1 alternatives) include:
- Prepare high‐level conceptual design/sketch for each short-listed alternative
- Summarize and compare any right‐of‐ way impacts and extent/significance of land acquisition
- Include the essential elements or treatments for pedestrians and bicyclists
- Critical/turning movement analysis of design vehicle and check vehicle(s) (i.e., oversize permit load scenarios)
- Identify significant environmental impacts (wetlands, parks, historic, etc.)
- Prepare capital cost estimate and summarize lifecycle maintenance and operation costs.
- Perform operational analysis to determine intersection delay and V/C ratio; and therefore, operational performance.
- Perform safety analysis to determine expected reduction in number of crashes, with an emphasis on the difference in severe crashes (i.e., those resulting in fatalities or injuries)
- Identify level of support from different stakeholders, including TxDOT, local government and other key stakeholders.
Interchange Analysis Checklist – Other Studies
No | Item | Review | |
Checked By | Date | ||
1 | Methodology Coordination | ||
1.1 | Methodology & Assumptions Coordination Meeting (M&A) conducted and meeting notes documented | ||
1.2 | M&A Memo includes a project description along with a project location map | ||
1.3 | Need and Purpose supported by data and justifies the project | ||
1.4 | Study area includes surrounding intersections as per M&A | ||
1.5 | Analysis years per M&A | ||
1.6 | Interchange control types to be considered and their assumptions per M&A | ||
1.7 | Operational, safety, and multimodal analysis tools selected per M&A | ||
1.8 | Cost benefit analysis tools selected per M&A | ||
2 | Data Input & Parameters | ||
2.1 | Existing turning movement counts or O-D data and crash data collected per M&A | ||
2.2 | Growth rates developed from historical data and approved by TxDOT | ||
2.3 | Long-range plans and improvements identified in the study area | ||
3 | Operational Analysis | ||
3.1 | Traffic operational analysis tools selected per M&A | ||
3.2 | Latest guidelines/standards have been used | ||
3.3 | Turning movement volumes converted to O-D volumes if comparing multiple itnerchange types | ||
3.4 | If microsimulatoon tool was used, the report includes the calibration memo | ||
3.5 | Manual calculation of ETT completed when automated software results are not available | ||
3.6 | Measure of Effectiveness (MOEs) are consistent with analysis tools and project settings | ||
3.7 | The results of traffic analysis have been reviewed for reasonableness | ||
3.8 | The results of traffic analysis are compared across every alternative under consideration | ||
3.9 | The traffic analysts software files checked to verify input and parameters | ||
4 | Safety Analysis | ||
4.1 | Safety analysis tools selected per M&A | ||
4.2 | Histoncal crash data and analysis conducted for latest 3 to 5 years | ||
4.3 | Safety analysis includes predicted crash frequency or evaluation of CMF | ||
5 | Multimodal Analysis | ||
5.1 | Multimodal analysis tools selected per M&A | ||
5.2 | Latest guidelines/standards have been used | ||
5.3 | If microsimulatoon tool was used, the report includes the calibration memo | ||
5.4 | Measure of Effectiveness (MOEs) are consistent with analysis tools and project settings | ||
5.5 | The results of multimodal analysis have been reviewed for reasonableness | ||
5.6 | The results of multimodal analysis are compared across every alternative under consideration | ||
5.7 | The traffic analysts software files checked to verify input and parameters | ||
6 | Other Considerations | ||
6.1 | Other MOEs (Including Cost Benefit Analysis) | ||
7 | Report | ||
7.1 | Summarize results and findings in report format |