****THIS IS A NEW IM. – PLEASE READ CAREFULLY.****
INSPECTION, ACCEPTANCE AND COMMUNICATION PROTOCOL OF CONNECTED PORTABLE TRAFFIC SIGNALS (CPTS)
Connected Portable Traffic Signals (CPTS) must meet the requirements found in the Manual on Uniform Traffic Control Devices (MUTCD – 2009) Part 6F.84 and Iowa DOT Specification Article 2528.03.G. CPTS utilized on the Primary Highway System must utilize GPS and Communications requirements set forth in Article 4188.11 and this IM. Approved Products that meet the GPS and Communications protocol are listed in the Materials Approved Products Listing Enterprise (MAPLE). CPTS that do not require GPS and Communication requirements are not included within MAPLE. Retrofit Kits for other Temporary Traffic Signal (TTS) types are included in Appendix A.
Approval Request Submittal Form: When a CPTS vendor or TTS Retrofit kit vendor is requesting the Department to evaluate its ability to meet 4188.11 and this IM, the vendor shall submit a device for testing and complete the form “ Connected Temporary Traffic Control Device Approval Form” found Here:
https://iowadot.gov/workzonereferencelibrary/docs/TBD__________Form.pdf
Communications Protocol: Manufacturers and Suppliers shall utilize the Iowa Connected Portable Signal Protocol (CPSP).
Appendix B describes in detail the communications protocol.
APPROVED PRODUCTS
Approved Products of CPTS meeting the requirements of Article 4188.11 will be listed in Appendix A of this IM within MAPLE. Retrofit kits for other TTS types are Included in Appendix A.
MAPLE does not list regular portable temporary traffic signals.
ACCEPTANCE
Acceptance of CPTS and retrofit kits for other TTS types are by Brand Name and Manufacturer as listed in MAPLE.