Los Angeles Street Mandate Could Remove Lanes Under Disputed $3.1 Billion Estimate

Los Angeles faces a constrained engineering choice: create more protected space for cyclists, buses and pedestrians without unlimited room for traffic lanes, parking, loading zones and emergency vehicles. Measure HLA, a voter-approved mandate tied to major road repairs, could reallocate street space on Lincoln, Santa Monica, Venice, Sepulveda, Sunset and Ventura boulevards. A previous city estimate put implementation at $3.1 billion over 10 years, although supporters dispute both the scope and assumptions behind that figure.

Mayor-elect Nithya Raman’s transportation platform calls for protected bicycle lanes, bus-only corridors, concrete barriers between bicycles and cars, residential speed humps and redesigned intersections. It also supports automated speed cameras, restored red-light cameras and making some bus lanes established for the 2028 Olympics permanent. Streets for All founder Michael Schneider expects the incoming administration to implement Measure HLA more aggressively. Raman’s City Council office directed inquiries to the campaign transportation plan rather than providing a separate comment.

Measure HLA changes when street design decisions become mandatory. When Los Angeles undertakes qualifying major repairs on a corridor covered by its mobility plan, the city must incorporate the planned bicycle, bus or pedestrian improvements. That approach can reduce duplicated construction by pairing redesign with resurfacing, but it also turns routine pavement work into a broader capital and traffic-engineering project.

Why the cost estimate remains disputed

The city’s earlier 10-year estimate assigned about $1.1 billion to bicycle upgrades and another $2 billion to sidewalk work, with community outreach potentially adding as much as $80 million. Supporters argued that the calculation included more than $1 billion in sidewalk repairs that Measure HLA did not require and assumed unusually expensive project designs. They also challenged the use of a 10-year completion horizon. City Administrative Officer Matt Szabo defended the figures as conservative and warned that the estimate did not include future construction-cost inflation.

The disagreement is therefore not only about the price of paint, barriers or concrete. It concerns which projects belong in the mandate, how quickly they would be delivered and whether planned work represents an added obligation or construction the city would eventually undertake anyway. The answer affects public-cost fairness because a large unfunded requirement could force Los Angeles to delay other transportation or infrastructure priorities.

Linking improvements to resurfacing can lower the incremental cost of some lane changes. The Federal Highway Administration notes that road reconfigurations can be relatively inexpensive when coordinated with reconstruction or resurfacing, particularly when the work primarily involves restriping. Protected lanes, new signals, curb changes, drainage work, accessible sidewalks and rebuilt intersections are more substantial interventions. A citywide estimate depends heavily on which treatment each corridor requires.

Safety gains depend on corridor selection

Removing a general-purpose lane does not have one universal effect. On a suitable four-lane undivided road, converting the cross-section to fewer through lanes plus a center turn lane can separate turning traffic, reduce weaving and create room for bicycle lanes or pedestrian refuges. FHWA cites studies showing overall crash reductions of 19% to 47% for road diets installed on previously four-lane undivided facilities.

Those findings do not establish the result for every Los Angeles boulevard. Traffic volume, intersection spacing, driveway density, bus frequency, freight movement and turning demand determine whether a redesigned corridor can maintain acceptable flow. FHWA also identifies possible downsides: fewer lanes may reduce capacity, stopped transit vehicles can obstruct traffic, and bicycle facilities can displace parking depending on the design.

Parking loss is especially consequential on commercial streets. A protected lane may improve access for people arriving by bicycle while reducing curb space used by customers, deliveries and service vehicles. Designers can shift loading to side streets or selected curb segments, but doing so transfers demand rather than eliminating it. Each corridor consequently needs a curb-use plan alongside its lane plan.

Emergency access is a design requirement, not a slogan

Opponents, including Councilwoman Traci Park and the firefighters’ union, have warned that narrower roads could worsen congestion and delay ambulances or fire engines. The concern should be tested through turning-path analysis, response-route modeling and field review rather than treated as a uniform outcome across the network.

Street geometry can accommodate large vehicles without designing every movement around their fastest possible turn. Guidance from the National Association of City Transportation Officials distinguishes between frequent design vehicles and less frequent large control vehicles. Possible accommodations include recessed stop lines, selective removal of parking near intersections and allowing emergency vehicles to use more of the right of way during turns. Those choices can preserve access, but they consume space and must be designed corridor by corridor.

Measure HLA’s implementation test will come when Los Angeles converts a citywide mandate into project-level decisions. The six named boulevards differ in traffic demand, transit service, adjacent businesses and available curb space. A credible program will need transparent cost categories and measurable before and after data on crashes, travel times, bus performance, parking, loading and emergency access. Without that accounting, neither the $3.1 billion estimate nor promises of safer, more efficient streets can be judged against the system Los Angeles actually builds.

By Thomas Caldwell — AMI’s senior editor for mechanical and mobility engineering, covering vehicle electronics, systems integration, electrification, chassis systems, propulsion, and safety policy.