TheTruckersReport.com offers a comprehensive table and specific descriptions for turning radius guidelines for trucks. The turning radius depends on the angle of the turn and the width of the road for calculations.
Using the chart provided on TheTruckersReport.com, two pieces of information are needed. The first is the angle of the turn. If the turn is between two angles, use the bigger one, so as to provide extra buffer room during the turn. The second step is to measure the road width. Look at the minimum road width column that corresponds to the turn's angle. If the road measurement is equal to or wider than the number listed, the driver is able to make the turn.