Battling monsoons, heat, live traffic and subpar soils, a joint-venture team expects to complete 30 miles of a Phoenix-area freeway expansion in just eight monthsadding another reason for the Arizona Dept. of Transportation to embrace design-build as it constructs projects to cope with growing traffic.

Kiewit Corp.和SUNDT Construction团队持有约9000万美元的合同，以在51号州际公路和10号州际公路之间增加30英里的高占用车道。

To do this many miles in [nine] months is pretty exciting, says Steve Mishler, ADOT project manager. Typically, this project would have been broken up into five pieces, and I would have been given 18 months just for design and a year and change for construction.

取而代之的是，Kiewit/Sundt与设计师Parsons Corp.和Urs Corp.一起使用了10％至15％的设计文件，在收到一月份的通知后开始施工。该项目计划于10月下旬完成整个地区的拼车网络。

The team had the flexibility to treat poor subgrade soils with a variety of methods.

We utilized geogrids, excavation and recompaction, and lime stabilization, says Travis McCarthy, Sundt deputy project manager. We first started with excavation and recompaction, but the project wouldn't have generated enough material for all the areas. Once we exhausted that, we went to lime stabilization. But to pave as much as we did, we had to work in multiple locationsso we went to geogrid operations.

根据该部分，团队选择了最经济或最实用的解决方案。

共同定位速度文件批准

多亏了Design-Build的主要特征Co-Location，ADOT官员及其通用工程顾问能够在几天之内审查和批准文件。麦卡锡说，我们开始平均约三天（用于审查周转）。

Despite poor soils and harsh weather conditions such as monsoons and heat, the overall construction was straightforward, says Allen Mills, Kiewit project manager.