6.2.5 Safety Performance for Intersection Control Evaluation (SPICE)

The SPICE tool is a macro-based, Microsoft Excel spreadsheet that was developed to provide practitioners the ability to evaluate the anticipated safety performance of various control types or intersection types within one tool during the scoping and screening stages of the project development process. This tool was specifically developed to help practitioners performing Intersection Control Evaluations (ICE) to identify alternatives to consider for additional analysis. The SPICE tool can be applied to the following intersection control types:
  • Traffic Signal;
  • Minor Road Stop;
  • All-Way Stop;
  • One-Lane Roundabout;
  • Two-Lane Roundabout;
  • Displaced Left-Turn (DLT);
  • Median U-Turn (MUT);
  • Signalized Restricted Crossing U-Turn (RCUT);
  • Unsignalized RCUT;
  • Continuous Green-T (CGT) Intersection; and
  • Jughandle
The SPICE tool is a static tool that does not allow for the flexibility that is available in some of the other crash prediction tools. The purpose of the SPICE tool is to allow the practitioner to evaluate a wide variety of intersection control types and select the most applicable control types that are then further evaluated using one of the more detailed tools like IHSDM or the HSM Spreadsheets. The SPICE tool can be used in conjunction with the CAP-X tool to perform preliminary analysis of intersection control types. Links to download the SPICE tool and user guide can be accessed on AASHTO’s HSM website, which is located in
Appendix G, Section 5 – External References (Reference 3)
, or the CMF Clearinghouse resources website, which is located in
Appendix G, Section 5 – External References (Reference 5)
.