LLPA System Replacement Across 100+ Sites
Wileo led delivery of a full Long Line Public Address (LLPA) system replacement across more than 100 operational locations for the Public Transport Authority (PTA), within the PTA's operating network.
This large-scale program - delivered in a complex brownfield environment - spanned train and bus stations, depots, feeder stations, and track section cabins, supporting more than 450 active users including customer service officers, control room staff, transit officers, and maintenance teams.
The program began in late 2014 with a structured strategy - market analysis, RFI, and early contractor involvement. By 2015, the Project Definition Plan was approved and the main contract was awarded.
At the heart of the solution was the deployment of a decentralised, networked Vocia system, replacing the ageing centralised platform. The solution provided:
- Improved audio quality across stations and control rooms
- Enhanced reliability through network redundancy and decentralised architecture
- Greater flexibility for future upgrades and integration
The system was also interfaced with train control systems via the Passenger Information Network (PIN) and Emergency Warning and Intercommunication Systems (EWIS). These interfaces formed part of the integration scope.
From early assessment to delivery
Wileo's team was engaged early to evaluate the market prior to tender, helping define the PTA's requirements before procurement. We then supported the technical evaluation process, supporting the PTA's assessment of the proposed solutions and suppliers.
Once the contract was awarded, Wileo led delivery for the PTA and worked with the contractor on technical architecture, configuration and integration of the system into the PTA’s operational environment.
Cutover and delivery outcomes
Despite the complexity of working across more than 100 live operational sites, the cutover was achieved without disruption to services. Early feedback from operational teams highlighted both the improved audio quality and the practical benefits of new system features.
Two senior Wileo engineers led the delivery as Project Manager / Engineering Manager and Project Engineer, collaborating closely with PTA staff. The team worked through the transition with operational staff and supported training and handover to maintenance teams.
The project was delivered on time and slightly under budget.
Support after cutover
While the new system was already operational, Wileo continued supporting the PTA with the decommissioning of the old infrastructure, fine-tuning of system performance, and staff training through to the end of 2016. This support continued the transition from project delivery into operation and maintenance.
The replacement moved the PTA from a centralised legacy platform to a distributed announcement system. Its delivery required coordination across operational sites and integration with the existing communications environment.
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