Specifications include, but are not limited to: Improving 16 miles of I-405 between the SR-73 Freeway in Costa Mesa and I-605 near the Los Angeles County Line. The project includes adding one regular lane in each direction from Euclid Street to I-605 and making improvements to freeway entrances, exists, and bridges. It also will construct the 405 Express Lanes, one lane in each direction from SR-73 to I-605. The City is requesting proposals from qualified firms for all work affecting the City’s facilities for asneeded construction support and inspection services related to the I-405 including but not limited to engineering specialties related to roadways, bridges, sidewalks, sewer, drainage, water, structural, geotechnical, landscape and traffic.