1995 Metric CSJ 's & SPECIAL PROVISION ITEM 4. Scope of Work

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May Webster
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1 1995 Metric CSJ 's & SPECIAL PROVISION TO ITEM 4 Scope of Work For this project, Item 4, "Scope of Work", of the Standard Specifications, is hereby amended with respect to the clauses cited below and no other clauses or requirements of this Item are waived or changed hereby. Article 4.1. following: Intent of Plans and Specifications is supplemented by the Work is proposed along the freeway corridor as indicated on the plans. A short distance of incidental work may be necessary outside the project limits to complete the project, as shown on the plans. The work to be performed on this contract consists of furnishing, installing, testing, and integrating components of a corridor traffic management (CTM) system for the freeway corridor. The State desires a system that is consistent, reliable, accurate, and maintainable. Component subsystems must function as an integrated whole. Component subsystems of freeway CTM include: 1. Duct Bank and Conduit Subsystem 2. Electrical Power Service And Distribution Subsystem 3. Twisted Wire Pair (TWP) Communication Subsystem 4. Fiber Optic Communication Subsystem 5. Voice Communication Subsystem 6. Communications Hub Enclosures 7. Vehicle Detector Subsystem 8. Lane Control Signals (LCS) Subsystem 9. Dynamic Message Sign (DMS) Subsystem 10. Closed Circuit Television (CCTV) Surveillance Subsystem 11. Traveler Information Stations/Highway Advisory Radio (TIS/HAR) Subsystem 12. Control Center Subsystem The Contractor shall performance test all subsystems from the voice communication equipment, CCTV central equipment, DMS central equipment, TIS/HAR central equipment, system control unit, and any other command and control center equipment furnished, installed, modified, or otherwise used and will become the property of TxDOT on this Contract to the respective field units. Any subsystem described on the plans and specifications, which have components furnished, installed, modified, tested, or otherwise used on this contract, that become the property of TxDOT, shall be subjected to a system integration test as described in the plans and specifications. Article 4.1. Intent of Plans and Specifications. The following subarticles are added:

2 4.1.(a) Duct Bank and Conduit Subsystem. Typically, a concrete encased duct bank consisting of multiple sizes and types of conduit exists or is to be installed along the corridor. The duct bank is generally located along the south or east cardinal direction of the freeway between the travel lanes of the freeway and the frontage road. Work included in this contract may expand the duct bank system as shown on the plans. The duct bank subsystem typically includes the following: 1. Conduit, Fittings, and Pull Cords 2. Concrete Encasement 3. Ground Boxes 4. Cable Racks Lubricant, formulated for pulling cables or conductors, shall be used when pulling cables or conductors through conduit. An existing duct bank may exist along or cross the roadway corridor. Several existing conduit configurations may be present (refer to Duct/Conduit Terminations plan sheet). Proposed duct bank installed under this contract shall be as detailed on the plans and specifications. Field devices are interconnected along the corridor by conduits to the communications duct bank. Voice, data, and video communications in the duct bank shall be via fiber optic cable and twisted wire pairs concentrated at hub enclosures, as shown on the plans (refer to Communication Cable Schematic and SC&C System Layout plan sheets). Power service for the field devices may also be routed through the duct bank. accept, service, and maintain conductors. 4.1.(b) Electrical Power Service and Distribution Subsystem. electrical power service and distribution subsystem typically includes the following: The 1. Electrical Conductors, Cables, and Wires 2. Electrical Service The electrical power service and distribution subsystem is interconnected via duct bank and conduit subsystem. The Contractor shall cooperate with the public utility companies in placing and connecting meters and other required service equipment, but the Contractor will not be required to furnish meter, metering equipment, and enclosures for same. The Contractor will not be responsible for payment for utilities during the testing of the systems. The Contractor shall contact the Austin Area Utility Coordinating Council ( ) at least 48 hours before commencing any work that would affect underground utilities. All electrical work and materials shall conform to the latest edition of the National Electric Code (NEC). All circuit breakers shall be clearly labeled to determine intended

3 use. A graphic schematic diagram indicating the location of the power source or nearest overcurrent protection device shall be engraved on a laminated three (3) millimeter thick plaque for each circuit breaker location. This plaque shall have a red face with a white core and permanently mounted in the immediate vicinity of the circuit breakers or panel board so as to be clearly visible. It shall be possible to determine the intended use of the circuit and location of the nearest power source or overcurrent protection device without the use of tools, charts, plans, or other accessories other than the labels and plaque. provide consistent, reliable, and maintainable electrical energy. 4.1.(c) Twisted Wire Pair Communication Subsystem. The twisted wire pair subsystem typically includes the following: 1. Communication Cable 2. Dial-up Modem 3. Limited Distance Modem (LDM) 4. Add/Drop Multiplexer (ADM) The twisted wire pair communication subsystem is interconnected via duct bank and conduit and electrical power service and distribution Field equipment transmitting data shall be interconnected to communications hubs with twisted wire pair (TWP) cable as shown on the plans and as directed by the Engineer. CCTV, DMS and TIS/HAR cabinets shall be interconnected to add/drop multiplexers at the communications hubs with TWP cable through the use of a limited distance modem. provide consistent, accurate, reliable, and maintainable communications. 4.1.(d) Fiber Optic Communication Subsystem. The fiber optic communication subsystem typically includes the following: 1. Fiber Optic Cable 2. Fiber Optic Tx/Rx 3. Add/Drop Multiplexer (ADM) The fiber optic communication subsystem is interconnected via duct bank and conduit and electrical power service and distribution The communications system installed on this contract may consist of a T-1, synchronous optical network (SONET), or hybrid thereof along the corridor. Communication equipment is typically concentrated at communication hubs located along the corridor. The Contractor shall install fiber optic communications material and equipment necessary for transmitting voice, data, and video signals from the field enclosures to a communications hub enclosure. This material and equipment shall consist of data multiplexer equipment,

4 fiber optic transmission equipment, and fiber optic cable. Any control center material or equipment shall be installed in the control center as shown on the plans and as directed by the Engineer. All of the field material and equipment shall be interconnected with the control center material and equipment via communications media as shown on the plans. Cable shall be connected to the required transmitters, receivers, add/drop multiplexers, and other interface equipment as shown on the plans. Command and control data shall be multiplexed and transmitted from the control center equipment to communications hub locations and demultiplexed for distribution to the various field equipment. Data from the field will also be collected and multiplexed in the communications hubs for transmission to the control center equipment. At the control center, as shown on the plans and as directed by the Engineer, the fiber optic cable shall be connected to the fiber optic transceivers and add/drop multiplexers which in turn shall be connected to the following equipment: 1. Add/Drop Multiplexer (ADM) 2. Voice Communication Equipment 3. CCTV Central Equipment 4. DMS Central Equipment 5. TIS/HAR Central Equipment 6. System Control Unit 7. TxDOT Command and Control and System Support Equipment provide consistent, accurate, reliable, and maintainable communications. 4.1.(e) Voice Communication Subsystem. The voice communication subsystem typically includes the following: 1. Voice Communication Equipment 2. Add/Drop Multiplexer (ADM) The voice communication subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, and fiber optic communication The primary voice communications system shall provide at least one (1) voice channel and shall consist of equipment to be installed in the control center and field equipment which shall be furnished by the Contractor for field personnel to use in any of the field equipment enclosures. Primary voice communications shall be via the voice orderwire circuits in the control center and the add/drop multiplexers in the field equipment enclosures. Each enclosure shall have voice communication equipment. For each voice channel, personnel at the control center shall be able to talk with field personnel at any enclosure at the same time

5 provide consistent, accurate, reliable, and maintainable voice communications. 4.1.(f) Communication Hub Enclosure. The communication hub enclosure typically includes the following: 1. Communication Hub Enclosure Communication hub enclosures are interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication Communication hub enclosures are proposed underneath existing structures as shown on the plans. These enclosures concentrate, enclose, and protect the communications equipment utilized in the communication They shall also provide a protected and comfortable place to service equipment. 4.1.(g) Vehicle Detector Subsystem. typically includes the following: The vehicle detector subsystem 1. Foundation for Traffic Signal 2. Detector Loop 3. Detector Loop Lead-in 4. Detector Unit 5. Detector Card Rack 6. Detector Card Rack Power Supply 7. Equipment Cabinet 8. Local Control Unit 9. System Control Unit The vehicle detector subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication Inductive loop detectors and occasionally, piezo electric sensors, are typically used to detect vehicles. Some detectors may be existing, however, the FTM system shall be supplemented by the installation of additional detectors as shown on the plans. Detectors are located near points of predicted traffic flow turbulence and in significant sections of anticipated uninterrupted flow. Typically, groups of detectors are spaced from one half to one mile lengths. Some detectors have been incorporated into the pavement placement operation in previous projects and their location is not apparent. Vehicle detectors are vital to the efficient operation of the FTM system. Installation and testing of these detectors shall be in strict accordance with the plans and specifications. Inductive loop detectors are operated by detector amplifier units located near a group of detectors. Signals generated when a vehicle passes over the loop are transmitted, via twisted wire pairs, to local control units (LCUs). Local control units are located within communications hub buildings under overpasses along sections of the corridor. Local control units organize the signals generated by the loop

6 amplifiers into a data stream. The data is multiplexed and added to other data streams with an add/drop multiplexer (ADM) for transmission along the corridor. This data is transmitted, via fiber optic transceivers, to a local system control unit (SCU) over single mode fiber optic cable and demultiplexed. The SCU may be located remotely or in a control center. The data is then transmitted to a transportation management server at the control center. The transportation management server analyzes the data for use by the system software (refer to SCU Block Diagram plan sheet). provide consistent, accurate, reliable, and maintainable vehicle detection. 4.1.(h) Lane Control Signal (LCS) Subsystem. The LCS subsystem typically includes the following: 1. Sign Walkway 2. Lane Control Signal Head 3. Equipment Cabinet 4. Local Control Unit 5. System Control Unit The LCS subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication Lane Control Signals (LCS) are to be installed above each travel lane of the freeway on overhead sign walkway supports as shown on the plans. Up to six (6) lane control signal heads may be controlled by a single local control unit located in field enclosures. These local control units are the same units that collect vehicle detector data. An operator issues commands thru a software interface to control each LCS. The commands are converted to a data stream and transmitted to an add/drop multiplexer where they are multiplexed and added to other data streams. The multiplexed data is transmitted to field devices via the communications infrastructure for this project and over single mode fiber optic cable along the corridor via fiber optic transcievers. The data stream contains addressing information that allows the data stream to be dropped, demultiplexed, and transmitted to the local control unit controlling the LCS. The local control unit receives the data stream and determines which output to activate in order to illuminate the desired message on the LCS. provide functions and illuminated signals which are consistent, uniform, reliable, maintainable, and visually clear. 4.1.(i) Dynamic Message Sign (DMS) Subsystem. typically includes the following: The DMS subsystem 1. Drilled Shaft Foundation 2. Traffic Signal Controller Foundation 3. Overhead Sign Support

7 4. Sign Walkway 5. DMS Field Equipment 6. DMS Remote Equipment 7. DMS Central Equipment The DMS subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication Each DMS is driven by a DMS field controller in a field enclosure. Local and remote manual control of a specific set of prestored messages is provided at each DMS field site. Dynamic message sign field equipment, master equipment, portable computers, and dial-up modems may be supplied by others. The Contractor shall supply and install sign supports, cabinet foundations, conduit, communication cables, power conductors, and limited distance modems as shown on the plans and detailed in the specifications. provide functions and illuminated messages which are consistent, uniform, reliable, maintainable, and visually clear. 4.1.(j) CCTV Surveillance Subsystem. The CCTV surveillance subsystem typically includes the following: 1. Drilled Shaft Foundation 2. Camera Pole Structure 3. Equipment Cabinet 4. CCTV Field Equipment 5. CCTV Central Equipment The CCTV surveillance subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication CCTV surveillance cameras are proposed at strategic locations along the corridor. These cameras furnish visual confirmation that the various components of the FTM system are in their correct mode. They also provide visual confirmation of free-flow conditions, incidents, congestion, and other conditions along the corridor. A corridor may include freeway travel lanes, ramps, connections, frontage roads, intersecting streets, and selected public sites. CCTV cameras shall be mounted on structures dedicated to the CCTV cameras. The CCTV cameras shall be provided with remote control features as described in the specifications. Video signals from the cameras shall be transmitted to the hub buildings via fiber optic cables. The transmission technique may be baseband or digitally coded as indicated by the plans and specifications. Personnel at the control center shall be able to monitor and control each of the cameras with the CCTV central equipment. CCTV video signals shall be transmitted to the control center via the communications infrastructure for this project. Transmission

8 may be baseband or digital as shown on the plans and detailed in the special specifications. The video signal shall be connected to the CCTV central equipment in the control center (refer to CCTV System Block Diagram plan sheet). Camera controls in the field shall be accomplished with the control panels of the camera controllers. Camera controls in the control center shall be via central control panels. Operator interface in the control center shall be via a physical control panel and also virtual control panel created by computer software. CCTV control signals shall be multiplexed for transmission to the control center. CCTV control signal transmissions shall be through the central camera controller over a communications infrastructure including add/drop multiplexers and fiber optic transceivers in the control center, and fiber optic transceivers, add/drop multiplexers, and camera controllers in the field enclosures via fiber optic cable. CCTV pole and field equipment shall be compatible with one another and function as an integrated subsystem. This subsystem shall display an useable image for operators and be free of excessive vibration. Image acceptance shall be the sole determination of the Engineer. provide functions and video images which are consistent, uniform, reliable, maintainable, and visually clear. 4.1.(k) TIS/HAR Subsystem. The travelers information station/highway advisory radio (TIS/HAR) subsystem typically includes the following: 1. TIS/HAR Field Equipment 2. TIS/HAR Central Equipment The TIS/HAR subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication The TIS/HAR provides traveler information on the corridor it is located on. TIS may also provide information on other corridors as deemed necessary by operators. Information is transmitted to travelers via an amplitude modulated (AM) radio frequency signal. The signal is received by travelers via a conventional AM radio. Radios of this type are largely commercially available and are offered as standard equipment on many vehicles manufactured in North America. TIS/HAR shall be controlled by operators in accordance with the plans and specifications via an existing software interface. TIS may be controlled by private and/or leased landline and/or wireless communication. provide functions and audio messages which are consistent, uniform,

9 reliable, maintainable, and visually clear. 4.1.(l) Control Center Subsystem. typically includes the following: The Control Center subsystem 1. Add/Drop Multiplexer (ADM) 2. Voice Communication Equipment 3. CCTV Central Equipment 4. DMS Central Equipment 5. TIS/HAR Central Equipment 6. System Control Unit 7. TxDOT Command and Control and System Support Equipment The control center subsystem is interconnected via duct bank and conduit, electrical power service and distribution, twisted wire pair communication, fiber optic communication, and voice communication An existing square meter (9.144 meter x 7.62 meter) room shall house all of the control center equipment for this project. The room is located in Building 14 at TxDOT Austin District Headquarters. The TxDOT Austin District Headquarters is located at 7901 North I.H. 35. provide functions which are consistent, accurate, timely, reliable, and maintainable

SPECIAL PROVISION Scope of Work

SPECIAL PROVISION Scope of Work 2004 Specifications CSJ 0914-00-301 & 0914-00-314 SPECIAL PROVISION 004---018 Scope of Work For this project, Item 004, Scope of Work, of the Standard Specifications, is hereby amended with respect to