Development of a sensor platform for roadway mapping : part b - mapping the road fog lines : final report.
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2015-04-01
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Edition:Final report
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Abstract:Our objective is the development and evaluation of a low-cost, vehicle-mounted sensor suite capable of generating
map data with lane and road boundary information accurate to the 10 cm (4 in) level. Such a map could be used for
a number of different applications including GNSS/GPS based lane departure avoidance systems, smart phone
based dynamic curve speed warning systems, basemap improvements, among others.
The sensor suite used consists of a high accuracy GNSS receiver, a side-facing video camera, and a computer.
Including cabling and mounting hardware, the equipment costs were roughly $30,000. Here, the side-facing camera
is used to record video of the ground adjacent to the passenger side of the vehicle. The video is processed using a
computer vision algorithm that locates the fog line within the video frame. Using vehicle position data (provided by
GNSS) and previously collected video calibration data, the fog line is located in real-world coordinates.
The system was tested on two roads (primarily two-lane, undivided highway) for which high accuracy (<10 cm)
maps were available. This offset between the reference data and the computed fog line position was generally
better than 7.5 cm (3 in).
The results of this work demonstrate that it is feasible to use a camera to detect the position of a road’s fog lines, or
more broadly any other lane markings, which when integrated into a larger mobile data collection system, can
provide accurate lane and road boundary information about road geometry.
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