In which situation would Lidar not be advisable for measuring speed?

Lidar technology, which stands for Light Detection and Ranging, relies on the emission of laser beams to accurately measure the speed of a vehicle. In low visibility scenarios, such as fog, heavy rain, or snow, the effectiveness of Lidar can be compromised. The laser light may scatter or be absorbed, reducing the accuracy and reliability of the speed measurements. Additionally, low visibility can hinder the operator's ability to clearly see the target vehicle and ensure that the Lidar system is aimed accurately.

In contrast, high traffic volumes, clear weather conditions, and open highway stretches are all situations where Lidar can perform optimally. High traffic can often lead to congestion that might necessitate speed enforcement, while clear weather allows for unobstructed use of the laser. Open highway stretches provide the necessary environment where the Lidar can effectively target vehicles without interference.