Free Republic

Dive Brief: The Pennsylvania Department of Transportation (PennDOT) has announced the completion of the state's first-ever diverging diamond interchange (DDI), located on Interstate 70, according to Equipment World. The DDI design eliminates left turns across oncoming traffic, improving vehicle flow and decreasing the chance of accidents. The agency also chose the DDI configuration because it could use the former interchange's cloverleaf footprint, reducing the impact of construction on the area. PennDOT said it modified the traditional DDI design slightly. Dive Insight: Design is one way transportation agencies are combating gridlock resulting from increased traffic. Other tools in DOT arsenals are...

Christiana Briganti-Dunn is a civil engineer who oversees design-build projects for the Virginia Department of Transportation, but two years ago, she found herself holding a set of paint swatches up against a wall like a homeowner planning a kitchen renovation. The wall was at Chapman Mill, a five-story stone gristmill built in the 18th century near Broad Run, Va. Christiana’s job was to pick colors that would be painted on a set of bridge abutments on nearby Interstate 66. Everyone wanted the bridges to look pretty. “When we were meeting with the communities of Haymarket and western Prince William County,...

In a state where four out of five traffic improvement projects bust their original deadlines, Florida transportation officials expect to beat the odds with one of the largest jobs ever undertaken in the Sarasota-Manatee region. Construction of the state’s first diverging diamond interchange at Interstate 75 and University Parkway, which began Aug. 3 and is set for two years, will end before the September 2017 World Rowing Championships draw tens of thousands of visitors to nearby Nathan Benderson Park, state officials promise. But the timeline leaves Prince Contracting, the Tampa-based company that won the $74.5 million contract, just one month...