This page for Origin of the Diverging Diamond Intersection
Published on Jun 23, 2014 This video depicts traffic movement through the Diverging Diamond Interchange (DDI)
scheduled to be built at the Interstate 70 interchange with Route 19 in Washington County.
The DDI is a new type of interchange that is growing in popularity.
The DDI can move traffic more efficiently compared to other interchange types.
The Pennsylvania Department of Transportation is in the process of implementing long term improvements
to Interstate 70 in Washington and Westmoreland Counties. The purpose of the improvements is to increase
safety and mobility. As part of the improvements, PennDOT will reconstruct I-70 between the junctions with I-79
adding a third lane in each direction and will improve the interchange with Route 19 (Murtland Avenue)
in South Strabane Township, Washington County. The current interchange at Route 19 is a substandard cloverleaf interchange that was constructed nearly 60 years ago.
With the desire to minimize impacts and to account for the traffic on both I-70 and Route 19,
a new interchange type was determined necessary. Category Education License Standard YouTube License
Celeste Van Kirk/Observer-Reporter Traffic moves along Interstate 70 at Murtland Avenue in South Strabane Township Tuesday. Image description Drivers who travel Route 19 under Interstate 70 at the Murtland Avenue interchange in South Strabane Township
could be navigating Pennsylvania’s first diverging diamond interchange later this year. Scott Faieta, assistant construction engineer for the state Department of Transportation overseeing the project,
said Tuesday it is a possibility, but not a certainty, that the DDI will be ready to open this construction season.
Traffic moves along Interstate 70 at Murtland Avenue in Washington on Tuesday. Celeste Van Kirk/Observer-Reporter
The view from Murtland Avenue of the new nearly complete(10/2016) interchange at the Murtland exit of Interstate 70 in South Strabane Township
- Jim McNutt/Observer-Reporter Drivers who travel Route 19 (Washington Road) under Interstate 70 in South Strabane Township should be prepared to negotiate a traffic pattern
they likely never have encountered when the diverging diamond interchange is implemented next week. The diverging diamond is the first in Pennsylvania and will require traffic to cross over and switch lanes, with traffic signals directing flow
to allow drivers to either pass through or get on the highway in either direction.
It is an element of a $51.2 million project that started in November 2014 to redo the Murtland Avenue interchange on I-70.
Golden Triangle Construction of Imperial is the general contractor for the state Department of Transportation project.
Officials say diverging diamond traffic flowing well in South Strabane Observer-Reporter-Sep 14, 2016 The diverging diamond, the first of its kind in Pennsylvania, is part of a $51.2 million project to renovate the Murtland Avenue in Wahington, PA
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