ADVANCED TRANSPORTATION CONCEPTS GROUP, INC. 1 - 2005

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EXHIBIT A Advanced Transportation Concepts Group 14 Sorenson, Irvine, CA 92602 August 22, 2005 Mr. T.C. Sutaria City Traffic Engineer ~ City of Santa Ana Public Works Department 20 Civic Center Plaza Santa Ana, CA 92702 Re: On-Call Consulting Services for the Design and Integration of the MIST System Dear Mr. Sutaria: Thank you for this opportunity to submit a proposal to assist the City of Santa Ana with ITS integration as the City's on-call ITS design and integration firm. The City has embarked on an exciting project to design and implement a MIST system integrated with the Model 2070 Advanced Transportation Controllers (ATCs). This project is very critical to the City for at least several reasons: 1. To provide the City a migration path out of the existing VMS system with a system capable of adaptive control, 2. To update the City with national standard 2070 A TC controllers, and 3. To give the City an opportunity to update its traffic system infrastructure. We believe the City has reached a fork in the road such that every step you take will affect the outcome of this project and each decision that you make will greatly impact the City well beyond the scope of this project, for years to come. Advanced Transportation Concepts Group (ATCG) has the expertise to guide and assist you with the following challenges: 1. Review of the original project scope of work and consultant agreements. 2. Review and inventory of City infrastructure. 3. Design and test communications infrastructure, 4. Design 2070 integration with City's existing NEMA-based traffic signal cabinets and transition to 332-type traffic signal cabinets. 5. Assist with testing and integrating MIST as the City's central system, 6. Assist with testing and integrating 2070 traffic control firmware, and 7. Documenting project results and findings for City's future reference. 8