Specifications include, but are not limited to: Continuous Monitoring Except during outages, defined below, the Sensor(s) should be continuously monitoring the Trigger Zone (see Section 1.2 definition) 24 hours a day, 7 days a week, and 365 days a year. Located within MDOT SHA Right of Way (ROW) The Contractor may not place the RSU, Sensor(s) or network equipment beyond MDOT SHA right of way. The technology used must be deployed within the existing MDOT SHA right of way. The Contractor may not build new infrastructure within the ROW, including any removal of pavement, curb or other geometry unless specifically approved by MDOT SHA. The Contractor may place devices on existing mast arms or poles, within the existing signal cabinet, or as an extension to the existing signal box, as defined in Section 3.2.1.2. Inclement Weather The RSU, Sensor(s) and network equipment should operate during all seasonal weather conditions, including rain and nighttime conditions. The Sensor(s) is/are not expected to operate to its full capabilities under extreme weather conditions, defined as: state emergency closures affecting the region in which the Sensor(s) is/are located due to high wind, tornados, hurricanes, and blizzards. The Contractor should limit the impact of rain, ice and snow on the performance of the Sensor(s) to the best of its abilities and demonstrate the Sensor’s capabilities in extreme conditions. Roadside Unit used to message approaching vehicles The RSU is defined here as the physical technological component that will send a wireless message, called the Warning Message. The RSU and Sensor(s) must operate in tandem once a Presence is identified, as defined in Section 1.2. It is not the purpose of this technology deployment to detect Presence and Trigger (see Section 1.2 definition) during any specific signal phase, pedestrian or otherwise – rather this warning mechanism would occur in complete isolation of the signal operations. The Contractor is not permitted to use the signal sensors or controller data at any time. The RSU for sending the message from the Sensor(s) to approaching vehicles shall be a dual-mode unit capable of utilizing Dedicated Short Range Communication (DSRC) or Cellular Vehicle-to-Everything (C-V2X) and shall have a minimum range of 450 feet from the signal pole at the intersection of MD 214 at Addison Road-Seat Pleasant Station entrance. Associated Equipment Requirements The equipment associated with the RSU and Sensor(s) must fit within the existing signal cabinet space, visuals of which are available in Attachment K. The network equipment must be compatible with MDOT SHA network devices. Contractor must provide any additional equipment necessary to ensure a complete and operational system. 100 amp service is currently provided to the signal cabinet. The electrical power use of the RSU, Sensor(s), and additional equipment must not exceed 50% of the remaining amp allowance in the signal cabinet box. If additional power is required for the RSU, Sensor(s), and network equipment, Contractor is required to obtain service and provide to the signal cabinet. Message Radio Frequency The message must be transmitted over traditional transportation radio frequencies as permitted by the United Stated Federal Communications Commission (FCC). The burden is on the Contractor to request, record, and activate the FCC license for the use of the RSU license on behalf of MDOT SHA due to the requirement in the license to record the exact radio, antenna, model, gain, and additional information being proposed. Given the current environment, MDOT SHA recommends for DSRC units to activate the DSRC capability in channel 180 as that is the only category the FCC has indicated would be permitted. Assuming the FCC changes their current processes, MDOT SHA may request the Contractor return to channel 172. To ensure compliance of the DSRC in channel 180, MDOT SHA recommends the RSU mounting height to 8 meters or less, which allows the Contractor to request the maximum Equivalent Isotropically Radiated Power (EIRP) allowable for channel 180 (23dBM). Outage The Sensor and network equipment must notify MDOT SHA ITS Division representatives within 5 minutes of failure to operate. Security Devices will be secure on existing infrastructure and not easily stolen or vandalized. Interoperability Testing The project will deploy technologies and applications that are interoperable with connected vehicle OBU equipment provided by outside parties. All technologies must comply with national standards and will require validation for conformity and accuracy of data transmitted. Cybersecurity and verification of user-side data must be interoperable with existing security deployments (such as in Washington, D.C.) and national credentialing systems. Contractor will assist MDOT SHA by providing all documentation for deployed applications, including, but not limited to, message format, Frequency and channel, notification methods (haptic, visual symbols, audible sounds, etc.), and all data fields needed for the correct implementation/operation of the application.
