Cone Zone: Week Of July 22, 2019


The Public Works/Traffic Division provides the latest updates on the following projects:

Diamond Dr Re-paving Starts Today, July 22

Star Paving will begin mill and overlay of the roadway surface between Los Alamos Canyon Bridge (aka Omega Bridge) and Sandia Drive/Orange Street with an anticipated finish date on or before high school begins Aug. 14.

Mill and overlay work will then proceed to between Sandia/Orange and the roundabout at San Ildefonso Road by Sept. 20. Final project completion is set for Sept. 27, weather permitting. Minimal full-depth reconstruction will be needed at some locations along with new striping and markings throughout the project area.

Residents and businesses along Diamond Drive can expect to see and hear activities related to road construction: noise, dust, heavy equipment movements, traffic/commuter impacts and delays, and intermittent parking restrictions.

Four lanes of travel (two in each direction) will be maintained during weekday morning and evening rush hour traffic to accommodate commute times. Two lanes of travel, one in each direction, will be maintained on Diamond Dr during working hours. 

Pedestrian detours will be in place and bike lanes will be closed on Diamond Dr within work zones. Bicyclists and motorists are asked to share the road.

Night and weekend work is anticipated. Crews will be onsite, 7 a.m. to 4 p.m. Monday through Saturday and nightly 6 p.m. to approximately 2 a.m.

If time permits, crews may elect to mill and repave the roundabout at San Ildefonso before Aug. 14. This will require the use of flaggers to direct traffic and result in some delays.

Crews will begin work Monday at Los Alamos Canyon Bridge (aka Omega Bridge) and proceed north to the San Ildefonso roundabout, with a goal to complete work in front of UNM-LA and the High School before school/college resumes for the fall session Aug. 14. 

Ongoing Manhole Repairs – Ponderosa Estates in Los Alamos: 

Crews continue adjusting manholes in Ponderosa Estates along Aspen Drive, Sumac Lane and Maple Drive. Work continues through the end of July. The concrete being used is a high strength mix and requires a cure time; therefore, residents are urged to avoid driving over these manholes for the first few days after they are poured. Traffic control will be set up daily in several locations along the project route and residents are urged to use caution when driving through and walking near these work zones. Work hours are 8 a.m. to 5 p.m. Monday through Friday.

Questions on the above projects? Email, or call 505.662.8150.

Other road construction projects:

N.M. 502 Roundabout and Road Reconstruction (NMDOT project) – Traffic Detour CHANGES Friday, July 26:

No change to traffic pattern for Monday through Thursday. The contractor continues working on common trench for utilities 9 a.m. to 4:30 p.m. Monday through Friday. Expect delays. The speed limit is reduced to 25 mph. N.M. 502 (Trinity Drive) east-bound traffic is being detoured to 4th Street and Central Avenue. After a full stop, motorists should turn right (east) and travel through the construction zone to continue eastbound out of Los Alamos on N.M. 502. Westbound N.M. 502 traffic entering Los Alamos and approaching the roundabout construction zone is being detoured onto Central Avenue; continue west to Knecht Street (or alternatively, continue to the traffic light at 15th Street) then turn left to return to Trinity Drive. There is only one lane of traffic in each direction on Central Avenue. 

Friday, July 26, 7 a.m. to 6 p.m., traffic will be detoured as follows to install a major (14”) waterline across N.M. 502 between Central Avenue and Canyon Road: Eastbound traffic will continue on Canyon Road and back to N.M. 502; westbound traffic will be detoured onto Canyon Road at 4th Street and back to N.M. 502. Detour signs will be in place to guide the traffic through the detours. Work should be completed on Friday, barring unforeseen conditions and weather permitting. The two-way traffic from Canyon Road east will stay in the current lane configuration.

Please slow down, use caution and expect delays in this area, especially during peak commute times.

Traffic advisories from NMDOT are available on and motorists are asked to check the site for updates on this project as it proceeds.

TA-21 Clean Up Project – DP Road (N3B project):

No change in truck traffic on DP Rd from last week’s report. Clean-up work on the LANL TA-21 Site at the far eastern end of DP Road continues. Large trucks carrying away demolition debris containers will be exiting DP Road at an average of approximately three trucks per day. Motorists are asked to be alert for trucks exiting; use caution when entering or exiting DP Road, as this area is near the N.M. 502 Road Reconstruction project.