Luas Cross City route map

The Client

The Railway Procurement Agency (RPA) build and maintain Dublin’s light rail transit system. The latest rail project to be undertaken is the Luas Cross City Project. This extension of Dublin’s Luas system will link up existing lines and bring the tram service to new areas of the city. This 5 year project involves a number of construction phases in the city centre and requires tight control of noise emissions to keep within planning limits. Sonitus Systems were awarded the contract to monitor noise emissions from the Cross City works using our dedicated monitoring technology.


Challenges and Requirements

  • 24-7 real time monitoring required for a 5 year project
  • Installation in some of the city’s busiest and loudest areas
  • Automatic measurement and remote reporting
  • Up to the minute noise limit checks and alerts
  • Minimum downtime during operation and maintenance

Our Solution

The RPA chose to deploy Sonitus Systems’ EM2010 Sound Level Monitor to meet the demands of the Cross City project. The system provides fully automated measurement and remote upload functions, meaning every event is captured and reported with no need for RPA environmental staff to be present on site. Eight key locations were selected by the RPA for construction noise monitoring and control. Each installation was fully specified by Sonitus Systems expert staff and all works were managed jointly with our electrical contractor Al Read Electrical Ltd.

24 hour measurement

The continuous measurement ability of the EM2010 allows the RPA to fully evaluate base line sound levels and gauge the impact of their construction work. Our automated online analysis system is tailored to each site, performing checks on all monitoring sites and alerting RPA staff in case of any breaches of planning limits.

Control through a single website

All measurement locations are controlled through our user-friendly website, allowing RPA staff to manage the entire project remotely. Our cloud-based platform monitors the performance of all equipment to ensure that each site is fully operational, meaning the RPA receive a fully managed service and complete peace of mind.


The Technology

The EM2010 is designed for ease of use and reliability. Everything from measurement, to communications, to analysing readings is automated so that minimum effort is needed for noise monitoring tasks. The RPA wanted a system that could provide the information they need to run their project, without requiring their busy staff to oversee all the operations. That's why the EM2010 was an attractive option - just plug it in and everything else is taken care of. Sound level measurements start straight away and the on board modem lets the EM2010 upload all readings to our database at regular intervals. The Wi-Fi interface also allows the user to download measurements or configure the system, without having to access the equipment. With multiple construction sites spread across the city, this is also a safety feature, staff are never required to enter a building site, they can simply connect to the EM2010 stations using a smart phone or tablet from across the street.

The monitors operate continuously, logging sound levels with user-defined intervals ranging from 1 minute to 30 minutes. All relevant broadband parameters are logged including user-selected LN statistics and Lmax using A and C weighting filters. We constantly monitor the performance of all our equipment, so if any site stops operating for any reason, we know about it. This means that the RPA are guaranteed maximum levels of data capture and system performance. The only downtime is for scheduled maintenance and even then we only switch them off for a few minutes.


Online Platform

Our web-based analysis platform allows users to access their sound level readings from anywhere. This was an important feature for the Luas Cross City project, where multiple contracting partners and staff need access to the information to manage construction works. Our software processes all readings from each monitoring site and presents the information that is needed at a glance. Sound level emissions for user-defined time frames are calculated and compared to planning limits. Email and SMS alerts are sent to designated contacts when site levels exceed these limits. The online platform removes the need for detailed data analysis, saving time and personnel costs.

The online platform also lets the RPA environmental staff investigate readings in more detail by plotting charts, viewing local weather information and generating and exporting spreadsheets.


Customer Benefits

  • Cost effective and reliable solution
  • Need for customer man-power removed from measurement and analysis tasks
  • Fully managed service ensures performance of systems and quality of measurements
  • Automated analysis provides information needed for project managers at a glance
  • Multiple partners can access and view information from any location
  • Email and SMS alerts provide full project control without the need for staff time monitoring levels