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In the event of multiplex or other communication failure from the <br />master to a particular intersection controller unit, the controller unit <br />shall revert to free operation. <br />Intersection Flash Program <br />It shall be possible for the operator to place any intersection or <br />group of intersections in flash or to return the intersection or group <br />of intersections from flash to system control, from either immediate <br />keyboard command; or from a subsystem pattern number. <br />Standby Operation <br />It shall be possible for the operator to place the local <br />intersection or group of intersections in the standby mode, or to take <br />the intersection or group of intersections out of the standby mode from <br />immediate keyboard command; or from subsystem pattern number. In <br />standby operation, intersection operation shall be independent upon <br />local controller capability. <br />Standby/Free <br />In standby or free operation, the intersection shall operate fixed <br />time, semi or fully actuated with volume-density on all phases as <br />programmed, dependent upon local controller capability. The <br />intersection shall operate in standby under the following circumstances: <br />(a) If the intersection is not assigned to a coordinated subsystem, it <br />shall operate in standby. Intersections may be assigned to a <br />subsystem on a time of day/day of the week basis. <br />(b) If the intersection is Fart of a coordinated subsystem and the <br />subsystem cycle length is zero, all intersections in that subsystem <br />shall operate free. <br />(c) If the intersection is part of a coordinated subsystem and the <br />computed traffic levels exceed the upper limit or fall below the <br />lower limit of programmed calculating levels, all intersections in <br />that subsystem shall operate free. <br />Remote Timing of New Intersection Controllers <br />(a) It shall be possible for the operator to set, list, or change the <br />following intersection parameters stored in the rgmotely alterable <br />Random Access Memory of a controller. _ <br />Green Max <br />Yellow Change* <br />Red Clearance* <br />Time Before Reduction <br />Time to Reduce to Min Ext. <br />Preset Ext. <br />Min. Ext. <br />Ped Walk <br />-14- <br />