Sustainable Solutions for SCM

technology, measurement and automation), to control, measure and supervise traffic in the city, increase safety of the road users, to immediately inform drivers, public transport passengers and public services of the current traffic situation. The gathered information is processed by the system to optimise traffic light cycles and provide the best traffic flow in the city. Furthermore, it will display all the necessary information on boards, by using the special infrastructure inWroclaw, which contains: 1,285 cameras (16 high-speed cameras with zoom function, 516 video surveillance cameras with a recording period of 14 days, 348 video detection cameras with a recording period of 14 days and 405 video detection cameras without recording capabilities), more than 100 km of telecommunication underground ducts, and 300 km of fibre-optic cables, 15 distribution switches as well as 148 access switches (together with almost 300 expansion modules), 650 vehicles equipped with on-board computers, detectors and other necessary equipment for communication, 169 dynamic passenger information boards, 13 boards with variable message signs located at key points in the city, 12 parking information boards. Cameras monitor different aspects of traffic in the city. They recognise the type of vehicles as well as columns of vehicles (so-called tailbacks). Based on the observations, the system decides which one is more important, so it will not have to wait at intersections. The system is able to program the traffic light cycles for a particular occasion, e.g. a mass event at the Municipal Stadium. Such information can be repeated every time there will be a match, when such a solution will be optimal and will be remembered. The system can repeat the task and quickly set the green light for the route of the fans and thus change the organisation of the lights in the city. [16] 7.7.2 City of Wroclaw The city of Wroclaw is the main city in the Wroclaw agglomeration. The city is the fourth largest in terms of population in Poland with 634,487 inhabitants and the fifth largest in terms of area with 293 km 2 . Administratively, Wroclaw is divided into 48 housing estates, which are auxiliary units of the city. Once the town consisted of 5 districts: Psie Pole, Srodmiescie, Stare Miasto, Krzyki, Fabryczna, which currently do not have their own legal status. However, they still figure as a criterion for organisation of many offices and institutions. The town is intersected by European, national and provincial transportation routes such as – the A4 motorway, A8 motorway, S5 express road, national road No. 5, national road No. 94 and national road No. 98. The interchange of the A4 motorway and roads No. 5, No. 35 and No. 98 is located in Bielany Wroclawskie, directly at the southern border of Wroclaw. With its radial shape, the structure of the road network of Wroclaw is heavily oriented towards the centre of the city. By the end of the 20th century, all the bridges on the main branch of the Odra River were centralised along its course length of approx. 2.5 km. In the years 2008–2011, the Wroclaw Motorway Bypass (AOW) was built, and since June 2009 the Wroclaw Eastern Bypass (WOW) has been built in stages. In the years 1977–1991, Route East-West was built in the city centre. Since the 1980s, the city centre bypass has been built in stages. The Wroclaw Western Bypass, also known as an agglomeration bypass, has also been built in stages. Lesnica bypass is currently designed, the construction of which was expected to start

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