# Episode 24: From Level of Service to Vehicle Miles Traveled Distinguishes traffic operations from environmental transportation impact under current guidance. ## Sources and attribution - [CEQA Transportation Impacts under SB 743](https://lci.ca.gov/ceqa/sb-743/) by Governor's Office of Land Use and Climate Innovation; published by State of California. - [Toolbox Tuesday Training Archive](https://scag.ca.gov/toolbox-tuesday) by Southern California Association of Governments; published by Southern California Association of Governments. This episode is an independent study production based on the sources listed above. Source attribution does not imply affiliation, approval, sponsorship, or endorsement by any author, publisher, or institution. ## License No broad open license identified; original summary and attribution only ## Production notes Preparation only. Not legal, planning, or financial advice. The narration is an original synthesis. Verify current law, guidance, course requirements, and source terms before relying on it. Stable episode ID: `aabee8f3-cede-5696-9cac-8ba7d4a793aa` ## Transcript Imagine a mixed-use proposal near Del Amo Fashion Center in Torrance. The traffic study predicts that one intersection will move from a familiar letter grade to a worse grade during the evening peak. A speaker says that result automatically creates a significant transportation impact under CEQA. Another says traffic delay no longer matters at all. Both statements miss the distinction. California changed the CEQA metric for transportation impacts, but cities still manage congestion, circulation, emergency access, and safety through other lawful tools. This episode is preparation, not legal advice about a CEQA document, threshold, or mitigation measure. Transportation analysis depends on current CEQA Guidelines, local thresholds, project facts, technical methods, and current state guidance. The law and guidance change. Follow the current statute, the lead agency's adopted policy, the administrative record, and advice from the Torrance city attorney. Level of service, or LOS, describes traffic operating conditions, often through vehicle delay at intersections or roadway segments. For decades, environmental review often treated added delay as the central transportation impact. That approach could reward projects far from destinations, where intersections had spare capacity, and penalize infill in connected places where more people already travel. Senate Bill 743 changed the CEQA framework. The CEQA Guidelines now provide that vehicle miles traveled, or VMT, is generally the appropriate measure of transportation impacts. VMT asks how much driving a project is expected to generate. A trip of two miles and a trip of twenty miles do not have the same effect under this measure. The shift serves several state objectives. It links land use with greenhouse-gas reduction, supports infill, and recognizes that housing near jobs, services, and transportation choices can reduce driving. It also avoids treating automobile delay itself as a significant environmental impact. Keep four analytical lanes separate. Lane one is CEQA transportation impact. That is where VMT screening, significance, and mitigation generally belong. Lane two is local circulation operations. The city may still study queues, turning movements, signal timing, curb access, and network performance for planning and engineering. Lane three is safety, including collision patterns, speed, sight distance, and the needs of people walking, cycling, or using mobility devices. Lane four is emergency and service access. A project can screen out from detailed VMT analysis and still need safe driveway design. A project can have significant VMT even if nearby intersections operate well. A project can create a queue requiring operational management without creating a CEQA-significant transportation impact. Use the right lane for each question. LCI's SB 743 Technical Advisory provides recommendations, not a substitute for a lead agency's supported judgment. Common screening concepts include small projects, certain local-serving retail, and projects in low-VMT or transit-supportive areas. Common analytical approaches compare project-generated VMT per resident or employee with a regional or local benchmark. The exact method and threshold must come from the applicable adopted policy and record. Land-use context drives VMT. Distance between homes, jobs, schools, shopping, and services matters. Street connectivity matters. Transit quality and reliability matter. Parking price and supply can matter. Household income, vehicle access, and job type affect travel behavior. A model simplifies these relationships. Its output is evidence, not an oracle. Ask what VMT is being measured. Project-generated VMT differs from a project's effect on total regional VMT. Residential VMT per capita differs from office VMT per employee. Boundary choices, horizon year, trip purpose, pass-by assumptions, and induced travel can change results. A good staff report names the metric and explains why it fits the project. Mitigation should reduce driving, not merely move cars faster. Possible strategies include a mix of uses, affordable housing in location-efficient areas, transit passes, parking reform, transportation-demand management, bicycle and pedestrian connections, telework programs where realistic, and improvements that make transit more useful. Every measure needs evidence, enforceability, and monitoring. Road widening deserves special care. Added capacity can reduce delay temporarily but can also induce additional driving. A measure aimed at LOS may conflict with the goal of reducing VMT. That does not make every roadway project improper. It means the agency must identify which problem it is solving and evaluate the consequences with the correct method. On June 30, 2026, the Governor's Office of Land Use and Climate Innovation published final guidance for the voluntary statewide VMT mitigation program established by Assembly Bill 130. The program creates an additional potential path for a project with significant VMT impacts. When operational and applicable, a lead agency may choose to allow a contribution to the Transit-Oriented Development Implementation Fund. HCD would use pooled contributions for VMT-efficient affordable housing and related infrastructure through the state TOD program. The state guidance describes how contributions are calculated, defines location-efficient areas, and provides methods for estimating and validating VMT reductions. The program is optional. It does not force every project or lead agency to use the statewide approach. It does not eliminate on-site mitigation or other lawful measures. The lead agency still decides feasibility for the project and must satisfy CEQA's requirements for enforceable mitigation and monitoring. The guidance also anticipates implementation work, including HCD administration and LCI rulemaking. Do not describe publication of guidance as proof that every operational mechanism is immediately available in every case. Check current program status. For practical application, build a four-lane transportation memo for the fictional Del Amo project. In the CEQA lane, identify the VMT metric, screening question, threshold source, result, and proposed mitigation. In the operations lane, list queue or circulation issues without calling them CEQA significance findings. In the safety lane, record speed, conflict, and vulnerable-user questions. In the access lane, record fire, delivery, paratransit, and service needs. Then add a mitigation hierarchy. First, avoid excess VMT through site selection and project design. Second, reduce VMT with on-site or directly connected measures. Third, evaluate broader or programmatic strategies. Fourth, if current law and program status allow, evaluate the AB 130 statewide contribution option. For each measure, list expected reduction, evidence, responsible party, funding, monitoring, and remedy if performance falls short. Do not promise mathematical precision that the model cannot support. Use sensitivity tests for major assumptions. Ask whether mitigation reductions are already embedded in the baseline. Avoid double counting one transit improvement in several measures. The commission's language matters. Say that LOS information may inform operations, capital planning, or conditions under independent authority. Do not call automobile delay a significant CEQA transportation impact. Say that VMT analysis addresses the amount and distance of driving. Do not claim that VMT measures every transportation concern. Now three recall questions. Question one. What is the basic difference between LOS and VMT? Answer. LOS commonly measures traffic operating conditions or delay. VMT measures the amount and distance of vehicle travel. Question two. Did SB 743 make circulation and safety irrelevant? Answer. No. It changed the general CEQA transportation-impact metric. Agencies still address operations, safety, emergency access, and engineering under appropriate authority. Question three. Is the AB 130 statewide VMT mitigation program mandatory? Answer. No. LCI describes it as a voluntary additional option. Lead agencies retain project-specific responsibility for feasibility, enforceability, and CEQA compliance. Your learner artifact is the four-lane memo and mitigation hierarchy. Include one sentence that explains the LOS and VMT distinction to the public. Add citations to the local threshold, LCI's SB 743 materials, and the June 30, 2026 final AB 130 guidance. Mark current program availability as a fact requiring verification. This lesson draws from the Governor's Office of Land Use and Climate Innovation public SB 743 transportation-impact materials, the CEQA Guidelines, the SB 743 Technical Advisory, and LCI's June 30, 2026 final AB 130 Statewide VMT Mitigation Program Guidance and frequently asked questions. It also uses SCAG public Toolbox Tuesday materials on local VMT and travel data. All narration is original. No source prose, slide, map, recording, or proprietary data has been copied. Confirm current guidance, regulations, local thresholds, program status, technical evidence, and city-attorney advice.