Individual vendors supplemented the TS 1 standard by providing the complement of features necessary for deploying coordinated-actuated traffic signal systems. Type 1 systems include the controller unit, conflict monitor, and the included features of each. The NEMA TS1 standard was successful for isolated actuated intersection control, but it lacked sufficient detail for implementing more advanced features, such as coordinated-actuated operation and preemption. Manufacturers would compete based on the hardware and software they provided inside the controllers. The TS1 standard was based on the philosophy that controllers would provide a basic set of features and standard connectors. The NEMA TS 2 standard expands on the older NEMA TS 1 Traffic Control Systems standard. NEMA TS 1 AND TS 2 TRAFFIC CONTROL SYSTEMS In case of conflict with Detector Terms and Definitions beginning on page J-2, those listed in Chapter 1 and Appendix P are recommended for the applications described in this Handbook.The term detector as used by NEMA is replaced by the terms sensor or electronics unit, depending on context, in the other chapters and sections of this Handbook.

Heading, figure and table numbers and font type in this appendix correspond to those in the actual NEMA standard rather than those found in rest of the Traffic Detector Handbook.

NEMA standards have headers and text set in Arial, normal, 10-point type.

For clarity, text in has been revised from the original. This appendix is reprinted by permission from the National Electrical Manufacturers Association. For further information and to order a complete copy of the standard, visit NEMA TS 2 was developed and is maintained by the member companies in the NEMA Transportation Management Systems and Associated Control Devices Product Group. NEMA TS 2-2003 is published by the National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847, Rosslyn, VA 22209. TS 2-2003 v02.06 was balloted in January 2003 and approved by NEMA in May 2003. Version v02.06 includes the revisions from TS 2 amendment 1 v01 and also includes minor revisions to sections 3, 5, and 6.

TS 2-2003 v02.06 is a revised and reballoted version of TS 2-1998. For further information, and to order a complete copy of the standard, visit The following excerpts are provided from NEMA Standards Publication TS 2- 2003 v02.06, Traffic Controller Assemblies with NTCIP Requirements. This NEMA standard excerpt is reprinted with permission of the National Electrical Manufacturers Association, 1300 North 17th Street,Suite 1847, Rosslyn, VA 22209. NEMA DETECTOR STANDARDS EXCERPTS INTRODUCTION Traffic Detector Handbook:Third Edition-Volume II APPENDIX J.

Ts2 vehicle diagnostic unit