THE RATIONALE USED IN DEVELOPING THE COMMUNICATIONS REQUIREMENTS ARE DESCRIBED. THESE INCLUDE THE REQUIRED CHANNEL ALLOCATIONS, THE COORDINATION REQUIREMENTS, THE DISPATCHING REQUIREMENTS, THE LOGGING REQUIREMENTS, THE IMMEDIATE EQUIPMENT REQUIREMENTS, AND THE TELEPHONE REQUIREMENTS. THE COMMUNICATIONS REQUIREMENTS FOR EACH AGENCY INCLUDED IN THIS PLAN WERE DEVELOPED FROM A DESCRIPTION OF EACH AGENCY'S COMMUNICATIONS EQUIPMENT, FACILITIES, AND OPERATIONAL CHARACTERISTICS. QUANTITATIVE REQUIREMENTS FOR EACH AGENCY, BOTH IMMEDIATE AND THROUGH 1982, ARE PRESENTED. THIS COMMUNICATION PLAN IS BASED UPON A CONCEPT INVOLVING ESTABLISHMENT OF 56 MOBILE RADIO ZONES WITHIN THE STATE. A MOBILE RADIO ZONE REFERS TO A GEOGRAPHICAL AREA WITHIN WHICH ALL AGENCIES PARTICIPATE IN A COORDINATED COMMUNICATIONS POLICE SYSTEM. SUFFICIENT CHANNELS ARE PROVIDED IN EACH MOBILE RADIO ZONE TO ALLOW INTERFERENCE-FREE AND LIGHTLY LOADED CHANNEL CONDITIONS FOR ALL AGENCIES. FEATURES OF THE PLAN INCLUDE A TEN-YEAR PLAN, MULTICHANNEL CAPABILITY FOR ALL AGENCIES, DEDICATED PRIMARY CHANNELS FOR LARGE AGENCIES, SHARED CHANNELS FOR SMALL AGENCIES, TOLL-FREE, EASY-TO-REMEMBER TELEPHONE NUMBERING SYSTEM, AND STANDARDIZED POLICE RADIO PROCEDURES. FOUR APPENDIXES ARE INCLUDED WHICH DESCRIBE SOME BASIC CONSIDERATIONS INHERENT IN UNDERSTANDING AND IMPLEMENTING THIS PLAN. APPENDIX A DESCRIBES THE MATHEMATICAL METHOD FOR DETERMINING MAXIMUM LOADING OF A CHANNEL. APPENDIX B OUTLINES THE FACTORS THAT MUST BE CONSIDERED IN ESTABLISHING A COOPERATIVE DISPATCH CENTER AND INCLUDES A TYPICAL INTER-LOCAL AGREEMENT THAT WOULD REPRESENT THE CONTRACT AMONG THE MEMBER AGENCIES OF A COOPERATIVE DISPATCH CENTER. APPENDIX C CONTAINS AN ANALYSIS OF GEOGRAPHIC SEPARATION REQUIRED FOR INTERFERENCE-FREE OPERATION, AND APPENDIX D PRESENTS A TYPICAL OPERATIONAL PROCEDURES HANDBOOK WHICH WOULD BE UTILIZED BY THE PARTICIPATING AGENCIES IN A COOPERATIVE DISPATCH COMMUNICATIONS SYSTEM. (AUTHOR ABSTRACT MODIFIED)