Map vehicle movements and turns to understand how motorists use the intersection. Overlay volume data to illustrate the relative importance of each movement, looking for low-volume turning movements, in particular. Pair this with observation and understanding of the local planning context and how the street fits into the overall traffic network.
Plot the signal phases to show how the intersection flows. Obtain phasing data from the appropriate agency, or create a general timing plan, ascertained with a stopwatch. Note whether pedestrian and vehicle signals are fixed or actuated. Observe how well the phases match volumes, how people comply, and when signals give priority to drivers, cyclists, or pedestrians.
Signs, and Markings
Survey the intersection’s dynamic conditions, or how people are meant to move through the junction based upon existing markings and geometry.