A 2014 report from the Federal Highway Administration lays out some of the pros and cons of road diets:Pros
• Improved safety for drivers by eliminating speed differentials between lanes traveling in the same direction and eliminating weaving between lanes.
• Increased mobility, safety and comfort levels for cyclists with the addition of bike lanes.
• Pedestrian crossings are easier and less complex with a reduction of travel lanes.
• Travel lanes often can be made wider.
• Two-way left-turn lanes make efficient use of limited roadway space and increase safety by eliminating the need for turning vehicles to stop in the left travel lane.Cons
• Mail trucks and buses can block traffic when stopped.
• Road diets have the potential to reduce the capacity of roads.
• Two-way left-turn lanes could be difficult to access for drivers if demand for left turns is high.
Source: Federal Highway Administration (tinyurl.com/roaddietproscons)