Abstract
Roadside vegetation can affect the performance of installed road lighting. We demonstrate a workflow in which a car-mounted measurement system is used to assess the light-obstructing effect of roadside vegetation. The mobile mapping system (MMS) includes a panoramic camera system, laser scanner, inertial measurement unit, and satellite positioning system. The workflow and the measurement system were applied to a road section of Munkkiniemenranta, Helsinki, Finland, in 2015 and 2019. The relative luminance distribution on a road surface and the obstructing vegetation were measured before and after roadside vegetation pruning applying a luminance-calibrated mobile mapping system. The difference between the two measurements is presented, and the opportunities provided by the mobile 3D luminance measurement system are discussed.
Highlights
Road lighting is installed mainly to increase traffic safety
The objective of this study is to demonstrate a workflow in which a mobile mapping system is applied in order to assess the light-occluding effect caused by the roadside vegetation
We presented a measurement system and a workflow to assess the road lighting-occluding effect of roadside vegetation
Summary
Road lighting is installed mainly to increase traffic safety. Road lighting can reduce the number of collisions and fatalities significantly [1,2,3,4,5,6,7]. In a meta-analysis by Elvik [8], road lighting was concluded to reduce fatal accidents by 65%, accidents with injuries by 30%, and collisions with only property damage by 15%. Correlations between speeding and lack of installed road lighting have been found [9]. The desired uniformity is present when the road lighting is installed. As the neighbouring vegetation grows, the lighting can become occluded and the safety critical uniformity in luminance distribution is compromised
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