Step 6: Perform Field Measurements of Speed
For the base or without-improvement case only, where the travel speed under the existing transportation situation is sought, travel speed can be measured in the field directly as an alternative to (or a way to confirm the results from) step 5. For this there are automated traffic monitoring devices that operate on the basis of laser, radar, infrared, and other technologies. Another way is to drive along with the traffic stream and record the speed of travel