Wheelchair accessible stations: Measurement road tests
As part of the project, Zurich's public transport company examined new stop edges for future bus stops. The aim is to enable wheelchair users to board buses in future without any obstacles. To this end, the approach geometry of the buses to the stop edges was examined in several road tests. We carried out and analyzed the measurements.
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For the measurements, the approach geometries were recorded with centimetre precision on a test area at provisionally created stopping edges. To do this, we measured various buses using laser scanning and determined control points. We measured the test runs using GNSS receivers. Three GNSS receivers were mounted on each bus unit. The measurements were recorded at 20 Hertz. We evaluated the kinematic recordings in Matlab using a specially programmed mediating 3D Helmert adjustment. This calculation method allowed us to take into account the unevenness of the test site as well as the transverse and longitudinal gradients and the associated tilting of the buses.
Our services
- Measurement of various buses using laser scanning, determination of control points
- Recording of the test drives using GNSS receivers
- Evaluation of the recordings in Matlab with specially programmed mediating 3D Helmert adjustment
- Transformation of the points in the local kinematic coordinate system into absolute coordinates
