{"id":9701,"date":"2020-06-03t18:54:10","date_gmt":"2020-06-03t23:54:10","guid":{"rendered":"\/\/www.dicovercards.com\/?post_type=snyder-projects&p=9701"},"modified":"2022-04-21t10:52:07","modified_gmt":"2022-04-21t15:52:07","slug":"increased-growth-highway-corridor-study","status":"publish","type":"snyder-projects","link":"\/\/www.dicovercards.com\/projects\/increased-growth-highway-corridor-study\/","title":{"rendered":"increased growth along iowa highway 141 leads to corridor study"},"content":{"rendered":"

improved operations & safety key to corridor study focus<\/strong><\/span><\/h2>\n

as communities surrounding the city of des moines<\/a> continue to experience rapid growth, the roadways that carry traffic into and around the city have also seen increased traffic flows<\/a>. serving as a major freeway link between des moines and the outlying communities to the northwest, iowa highway 141 is one of those impacted roadways. one particular section of iowa 141 directly east of the town of granger had been especially hard hit by increased traffic flows \u2014 experiencing an increase in the number and severity of crashes where it intersects with northwest 121st<\/sup> street.<\/p>\n

in partnership with the iowa dot, polk county authorities engaged snyder & associates to review traffic operations and the safety<\/a> history along this busy stretch of the highway corridor<\/a>. the study was designed to identify short-term traffic engineering solutions and alternatives that can be implemented to improve safety and operations. <\/a>because this stretch of corridor also intersects with the western-most termination point of iowa highway 415, this study also included long-term interchange<\/a>, intersection<\/a>, and corridor improvement needs to meet the forecasted increase in traffic demand<\/a>.<\/p>\n

targeted focus area for corridor study success<\/strong><\/span><\/h2>\n
\"red<\/a>

before the proposed improvements, left-turn movements at the busy northwest 121st street intersection were extremely dangerous.<\/p><\/div>\n

the primary focus area for this project was to address safety concerns related to the elevated crash rate at the iowa 141 and northwest 121st<\/sup> street intersection. the east\/west running iowa 141 is a four-lane, high-speed highway divided by a wide median. traffic attempting to enter from northwest 121st<\/sup> street faces a difficult and dangerous movement when crossing or turning left onto iowa 141. additionally, left-turning traffic was also subject to queuing issues in the median, leading to crashes. at the time of the study, this intersection was ranked 23rd<\/sup> statewide on the iowa dot safety improvement candidate location (sicl) list.<\/p>\n

the secondary focus was to address all intersection operational issues within the corridor study area<\/a>. in addition to the problems at the iowa 141 and the northwest 121st <\/sup>street intersection, our traffic analysis also revealed that the intersection of iowa 415 and northwest beaver drive was functioning at poor levels of service for some traffic movements during the am and pm peak periods.<\/p>\n

世界杯足球比赛预选赛 input meetings drive solutions<\/strong><\/span><\/h2>\n

numerous 世界杯足球比赛预选赛 meetings were key to the success of this study<\/a>. an initial meeting was held to update concerned citizens and stakeholders on the study background data and environmental constraints in the focus area<\/a>. also, the 世界杯足球比赛预选赛 feedback our team received regarding corridor safety and operations was used to advance potential intersection and roadway alternatives, and eventually assisted in the development of recommendations for improvements to the area.<\/p>\n

a follow-up 世界杯足球比赛预选赛 information meeting allowed our team, along with polk county and iowa dot staff, an opportunity to explain the study and some of the alternatives being considered. residents and other interested parties were also allowed to express their opinions and ask questions regarding the project and any potential solutions.<\/p>\n

numerous alternatives provided for consideration<\/strong><\/span><\/h2>\n

to remedy the high crash levels at the iowa 141 and northwest 121st<\/sup> street intersection, four viable alternatives were put forward for consideration. these alternatives included:<\/p>\n