Safety and security are a critical issue for railways and roads network. A good transportation system promotes and accelerates the economic development of any country, or its consolidation.
The traditional method of road/railways monitoring by physical inspection is time-consuming, costly and requires much manpower and materials.
Transport Entities need to use Remote Sensing, GIS and advanced technology to monitor safety and security, both of railway and highways/roads. They ask for rapid and interoperable response information systems, to support planning and operations phases, avoid damages, incidents, respecting the living people around the lines and, not least, saving costs.
In addition, the level of noise along the networks, especially in case of settlement crossing, must be measured and monitored, also for fulfilling local law requirements, for permitting to keep the noise below the threshold level set by the local regulations, often different for day and night time.
The solution is based on the provision of data and services through the use on remote sensing data. In fact, remote sensing imageries allow to monitor transportation systems, providing several types of information that can be managed through GIS base platforms. Remote Sensing and derived products support planning, construction and operations phases
Our solution enables the detection of slow movements (e.g. slight subsidence, ground movements, landslides) occurring along and close to the infrastructure by adopting e-GEOS proprietary processing technology (PSP-IFSAR). This solution allows to collect displacement measures over points scattered on the territory, with a density that, in urban areas, can exceed 20,000 points per squared kilometre. Therefore, this solution can be adopted for controlling the displacements over large extensions, without any kind of ground measurements and instrumentation setting up and maintaining, over every location on the earth, as follows:
- During Project phase for analysis of displacements along and close the selected project track
- During the Operations and management phase for monitoring infrastructures displacement, as well as to identify in time slow subsidence or landslide phenomena that can have impact on infrastructure operational life cycle
Measures are fully tri-dimensional and all measures can be managed in any GIS systems. Achievable accuracy in the velocity estimation is continuously tested vs ground measurements.
ORTOIMAGES AND DEM
Ortoimages and Digital Elevation Models allow a full digital description of an area. They can be generated from satellite data with several levels of detail and accuracy according to the desired reference scale. They can be used:
- During the bidding phase for best site selection for the new track
- During the project phase for a detailed choice of track location, and a proper estimation of all actions (demolitions, permissions, etc) to be performed for infrastructure construction
- During the operational phase for monitoring changes occurring in the infrastructure surroundings
Product scale is in the range 1:5,000 – 1:100,000, while resolution of the images starts from 30 cm, allowing a very detailed analysis of the area. All products are “plug’n’play” products, that can be directly ingested inside each customer GIS systems, without requiring additional processing and easily integrated in user workflows and procedures.
Our solution provides noise estimation along the linear infrastructure extended to a strip up to 1 kilometer wide centred on the infrastructure. The noise maps are generated starting from a detailed three-dimensional reconstruction of all the area that must be interested by the noise level estimation.
The reconstruction is based on the processing of satellite data for the generation of virtual digital 3D environment based on a DTM, 3D building extraction, identification of main objects (barriers, vegetation, infrastructures, etc) that can affect noise propagation. Over this virtual 3D reconstruction, noise point measures along the infrastructures are spatialized, through specialized software.
For each location included in the analysis strip is provided the noise level estimated, that can be compared with regulation or desired noise threshold values. The generated noise by the infrastructure is estimated in three dimensions, therefore its level is provided along all the floors of a building, allowing a proper identification of noise reduction actions. Results can also be diffused through 3D geoportals