{"id":8555,"date":"2020-01-22t10:15:04","date_gmt":"2020-01-22t16:15:04","guid":{"rendered":"\/\/www.dicovercards.com\/?post_type=snyder-projects&p=8555"},"modified":"2023-07-10t14:28:45","modified_gmt":"2023-07-10t19:28:45","slug":"obsolete-bridge-design-new-construction-over-river-interstate","status":"publish","type":"snyder-projects","link":"\/\/www.dicovercards.com\/projects\/obsolete-bridge-design-new-construction-over-river-interstate\/","title":{"rendered":"obsolete bridge design leads to new construction over the west nishnabotna river along interstate 80"},"content":{"rendered":"

major interstate bridges require updated design profiles<\/strong><\/span><\/h2>\n

extending 306 miles across the state, interstate 80 is iowa\u2019s longest interstate highway. it\u2019s also one of iowa\u2019s busiest roadways<\/a>, carrying the vast majority of the truck traffic through and around the state. this heavy traffic<\/a> also results in the premature aging of highway infrastructure<\/a>, particularly bridges and roadway surfaces<\/a>. in a coordinated effort to replace two interstate 80 bridges over the west nishnabotna river, the iowa dot partnered with snyder & associates and their affiliate 2022足球世界杯小组赛赛程 <\/a> to design and oversee construction on this project<\/a>.<\/p>\n

each of the original 300′-long x 30′-wide continuous welded girder bridges carry two lanes of interstate traffic \u2014 one bridge for westbound and one for eastbound traffic. not only were these bridges structurally deficient, their narrow design also meant they were functionally obsolete. current design guidelines for new interstate bridges require the design have full-width shoulders in addition to the two 12′-wide travel lanes. the replacement design called for two 319′-long x 40′-wide continuous welded girder bridges to meet the required guidelines.<\/p>\n

additionally, the current roadway approaches leading to the bridges did not have the necessary \u201cclear zone\u201d geometry required by the current federal highway administration (fhwa) minimum standards. a clear zone is an unobstructed area adjacent to a roadway that allows a driver to stop safely, or regain control of a vehicle that has left the roadway. the necessary addition of this feature provides an enhanced level of safety to all motorists.<\/p>\n

multiple services provided for interstate bridge project<\/strong><\/span><\/h2>\n

the 2022足球世界杯小组赛赛程 and snyder & associates design team provided numerous services over the course of this project, including:<\/p>\n