1-652 Development of Standard MS4 Accessible Gantry Superstructure Design

The purpose of the task is to develop a standard design for the MS4 accessible cantilever gantry superstructure to satisfy the following requirements: - Provide support for a standard MS4 Variable Message Signal (VMS) in accordance with the Version 3 specifications - Provide support for a number of ancillary items listed in the attached Annex A. - Provide safe access from the verge to the signal and ancillary items while the network is operational ie an accessible gantry. - Be supported on a scheme specific substru...