Plaza de Castilla is a transport interchange in Madrid where Madrid Metro lines 1, 9 and 10 converge underground. In addition to the metro station, it has an underground bus terminal and correspondence with a large number of surface bus lines, which makes it one of the largest transport interchanges in Madrid.

The Seville Metro is a network that serves the Andalusian city of Seville (Spain) and its metropolitan area. It currently consists of an operational line, inaugurated on April 2, 2009, which has a total of 22 stations spread across four municipal areas of the metropolitan area. With a length of 18 km and 22 stations, it is the fifth red in Spain in terms of number of passengers and kilometers operated

Bilbao Metro has EN-54 certified public address and voice evacuation systems in its facilities.

Railway linking Akko and Karmiel involves a double track along 23 kilometres and is part of Netivei, the National Transport Infrastructure railways system. The project costs near 800 million dollars and includes a station in Ahihud and 4.6 kilometre Gillon Tunnels. The line links up the Haifa-Nahariya line, south of Akko station and north of Kiryat Motzkin station.

Botswana Railways is a crucial link in the Southern African region. Its strategic location and connections with the rest of the region's railway operators makes it the most comfortable, reliable and efficient transport method in Botswana. It consists of almost 900 kilometres with Cape track width (1 067 mm) and its main line runs through Southeast Botswana along 640 kilometres

The Rio de Janeiro metro is a massive underground railway network that serves the city of Rio de Janeiro, Brazil. Opened in 1979 with a single line and five stations, today it includes 41 stations, 57 kilometers of operational routes and three lines (Line 1 Orange, Line 2 Green and Line 4 Yellow) that carry approximately 1 million passengers per day. In 2016, on the occasion of the celebration of the Olympic Games in the city, Line 4 was launched, as an extension of Line 1 connecting Ipanema and Barra da Tijuca.

The train network of Rancagua Express in Chile, now in commisioning stage, unites Santiago and Rancagua cities in 18 train stations. The project required an advanced PA/VA system that were flexible and robust, therefore, LDA systems were finally installed.

The Malaga Metro started operating in 2014, ten years after the launch of the project as one of the largest public works in Andalusia. This network required an advanced public address and voice evacuation alarm system that was both highly flexible, to cover all stations, and robust, to ensure safety in any emergency. The public company chose LDA Audio Tech to supply these systems, which were installed throughout the entire metro network