Diamond Drive and San Ildefonso Road Roundabout

Los Alamos, NM

MTJ engineering was retained to provide analysis, design and peer review services to develop a retrofit roundabout design to correct existing design deficiencies that produced safety, congestion and operational problems with large trucks due to deficiencies in geometry and driver information.

The MTJ corrective re-design re-stored the safety, capacity and operational requirements for this busy heavily used roundabout that also serves as a crossing point for a regional multi-modal pathway. Key to this effort was developing an exceptional design within the severe constraints imposed by the steep grades and existing roadway alignments.

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