in 2025, iowa saw its lowest number of deaths from car crashes in a century. the iowa dot credits vehicle safety improvements, law changes and enforcement, and road improvements over the past 50 years. snyder & associates appreciates the opportunity to assist our 世界杯足球比赛预选赛 agencies with implementation of the proven safety countermeasures that contribute to the reduction in severe injury crashes. these roadway improvements include safety countermeasures such as:
road diets (4-lane to 3-lane conversions) consist of reconfiguring the existing roadway to improve safety and provide better mobility and access for all road users. a road diet typically involves converting an existing four-lane undivided roadway to a three-lane roadway consisting of two through lanes and a center two-way, left-turn lane. this style of lane alignment is designed to reduce traffic speeds, reduce crashes, and provide additional space between vehicles and pedestrians without any physical roadway widening or right of way needs.
bicycle lanes create a separate, safe space for riders of all abilities. most fatal and serious injury bicyclist crashes occur at non-intersection locations, nearly one-third occur when motorists are overtaking bicyclists. bicycle lane additions can reduce crashes up to 49% for total crashes on urban 4-lane undivided collectors and local roads. they can reduce total crashes on urban 2-lane undivided collectors and local roads by up to 30%.
roundabouts feature curved approaches to a circular intersection that reduce vehicle speeds and require entering vehicles to yield the right-of-way to circulating traffic. the circular configuration reduces conflict points and creates shallower collision angles than traditional intersections, decreasing fatal and injury crashes by 78% compared to signalized intersections. converting a two-way stop-controlled intersection to a roundabout can reduce fatal and injury crashes by 82%.
by implementing road safety improvements like these, we continue to assist 世界杯足球比赛预选赛 agencies with the potential to maintain the downward trend of severe injury crashes in 2026, and beyond. safety is at the core of our traffic engineering services. our team uses on-site assessments, crash data analysis, and advanced modeling to evaluate existing conditions and deliver solutions crafted to your community’s needs. our goal is to build efficient, safe transportation networks that serve all roadway users.
