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Transportation infrastructure investment has a direct impact on economic activity due to direct job creation of a project and the following macroeconomic impact of regional multipliers. Achieving the maximum net economic benefit from our transportation investments is essential in this period of economic hardship and difficult budget choices at the Federal, State, and local levels. DOT is committed to fostering policies and investments, including investment in the transportation workforce of the future that will 9 produce the greatest economic benefit for the broadest number of citizens and businesses and will lay the groundwork for long-term economic growth and prosperity.

Connected and autonomous systems Safety and security

Safety and traffic flow issues are related to drivers selecting inappropriate speeds when driving. For example, at some curved interchange exit ramps, drivers may go too fast, increasing the risk of rollover crashes, especially for heavy trucks. At other locations, perceived 'bottlenecks' in roadway geometry may cause some drivers to slow down more than is appropriate, resulting in variations among vehicle speeds, and increasing the likelihood of traffic congestion, delays and rear-end crashes.

The Economy of Preventive Maintenance of Concrete Bridges

A cost-effective bridge is a bridge whose maintenance is based on its chemical condition over it's entire service life.  If deterioration mechanisms are prevented, a bridge would cost considerably less to maintain and safely serves its full design service life, if not longer.  The current practice for physical evaluation and delayed maintenance of deteriorated concrete bridges is fundamentally wrong.  The current inspection manuals are primarily focused on detecting physical damage in concrete bridge elements.

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