Immediate Change for Today and into Tomorrow
California faces persistent and complex challenges when it comes to traffic congestion, air pollution, and fuel inefficiency. These are challenges that most states and countries have not addressed directly with California often choosing to address them through innovation. It almost feels as if California believes that its 30 million registered vehicles are the only ones that need attention in the world. California has some of the busiest highways in the country; the state is a microcosm of global transportation issues. These problems aren’t just inconvenient, they’re costly, environmentally damaging, and increasingly unsustainable.
As California hopes to be more efficient in the future, the urgency to rethink how we manage traffic today, regulate emissions, and approve infrastructure designs has never been more important. Climate change, public health concerns, and rising fuel costs demand bold, innovative solutions that can start today without designing or building a new vehicle.
But here’s the good news: we don’t need to wait for new vehicle designs or new laws. We can build on and learn from our existing infrastructure and vehicles, making improvements that reduce waste and smog without unnecessary disruption. The strategies outlined here are designed to work with the systems and vehicles we already use today on our highways. These are practical, immediate actions that can be implemented using existing infrastructure, regulations, and technologies.
These ideas focus on:
- Reducing unnecessary fuel consumption
- Improving traffic flow
- Modernizing transportation policies
- Apply environmental and traffic laws fairly and equitably to all drivers
Whether through smarter road design, stricter enforcement of existing environmental controls, or rethinking how we use lanes and speed limits, these changes can make a measurable difference in both urban and rural communities, starting right now.
In the sections that follow, I’ll explore practical proposals that can help California cut down on gas usage and smog, while improving the overall driving experience for most.
1. Remove Metered Lights from Freeway On-Ramps
Ramp-metering traffic signals that regulate vehicle entry onto freeways are designed with a hope to reduce congestion. However, they force vehicles to stop, idle, and then accelerate rapidly, which increases fuel consumption and emissions.
- Fuel and Emissions Impact: Studies show that stop-and-go traffic, including ramp metering, increases greenhouse gas emissions due to frequent acceleration and idling. Optimal cruising speeds (are more fuel-efficient and produce fewer emissions than stop-and-idle-and-go conditions. [ww2.arb.ca.gov]
- Brake Wear and Pollution: Frequent braking at ramp meters contributes to brake dust, a significant source of particulate pollution and causes more servicing. Servicing creates more waste. [epa.gov]
Recommendation: Reevaluate ramp metering systems by removing them. Also consider alternatives like dynamic lane management or smart traffic flow systems that reduce unnecessary stops.
2. Replace 4-Way Stops with Roundabouts
Roundabouts allow continuous vehicle movement, reducing the need for full stops and sharp accelerations.
- Efficiency Gains: Roundabouts are up to 30% more efficient than 4-way stops and reduce fuel consumption and emissions by minimizing forced idling and acceleration. [interesting…eering.com]
- Environmental Benefits: Less idling means lower emissions and reduced fuel use. Roundabouts also reduce noise pollution because of the acceleration and improved pedestrian safety. [iihs.org]
Recommendation: Convert suitable 4-way intersections to roundabouts, especially in residential and suburban areas.
3. Enforce California Smog Standards for all Vehicles on California Roads
California has some of the strictest vehicle emissions standards in the world, but many vehicles on California streets and highways do not meet these requirements. Encourage all vehicles operating in California, including those from out of state or country, to meet California’s high smog standards through education, incentives, and fair enforcement.
- Current Law: Any vehicle operated in California with California registration must comply with California emissions standards, regardless. [dmv.ca.gov] [absmogcheck.com]
Recommendation: Strengthen enforcement by requiring temporary visitors driving on California streets and highways (e.g., from Mexico, Arizona, Nevada) to conform to California smog standards if staying longer than 24 hours during a calendar year. Non-compliant vehicles should be required to remedy non-compliance before leaving the state, or face impoundment and forced compliance.
4. Allow Vehicles to Drive at Their Most Efficient Speeds
Most vehicles achieve peak fuel efficiency between 45–75 mph. Driving above or below this range increases fuel consumption.
- Efficiency Drop-Off: Fuel economy drops by 3–8% for every 5 mph over 60 mph. Driving at 75–80 mph can reduce fuel efficiency by up to 28%. [mpgforspeed.com]
- Government Guidance: The U.S. Department of Energy recommends maintaining speeds around 50 mph for optimal fuel economy. [energy.gov]
Recommendation: Adjust speed limits and traffic flow systems to encourage driving within the optimal fuel efficiency range.
5. Prioritize Inefficient Vehicles in Fast and Carpool Lanes
Allowing less efficient vehicles to maintain steady speeds in fast or HOV lanes would reduce their emissions.
- Stop-and-Go Impact: Inefficient vehicles in congested lanes produce more smog and brake dust due to frequent acceleration and braking. [shunwaste]
- Brake Dust Pollution: Brake wear is a major contributor to urban particulate pollution. [ww2.arb.ca.gov]
6. Promote Safe Driving and Discourage Impeding Traffic
Promote safe and efficient driving through education and community engagement, while ensuring that traffic laws are fairly enforced to maintain flow and safety. While speeding is a common concern, driving too slowly can also be dangerous and inefficient.
- California Law: Vehicle Code §22400 prohibits driving at such a slow speed that it impedes or blocks the normal flow of traffic, unless necessary for safety or legal compliance. [shouselaw.com]
- Real-World Impact: Slow drivers in fast lanes or those who fail to keep up with traffic can cause backups, increase emissions, and lead to unsafe lane changes by other drivers. [facchettilaw.com]
Policy Suggestion: Increase enforcement of minimum speed laws and educate drivers on the importance of maintaining the flow of traffic. Consider measures to address chronic traffic impediments, such as targeted education and, when necessary, fair enforcement.
7. Promote Remote Work and Flexible Schedules
Reducing commuting can significantly lower vehicle miles traveled (VMT), easing congestion and cutting emissions.
- EPA Findings: Travel efficiency strategies like employer-based transportation management and remote work can reduce emissions and improve air quality. [epa.gov]
- Health & Climate Benefits: Less commuting means fewer emissions from cold starts and idling, which are major contributors to smog. [epa.gov]
Recommendation: Adopt remote work policies or staggered shifts to reduce peak-hour traffic.
8. Implement Congestion Pricing in High-Traffic Zones
Charging fees for driving in congested areas during peak hours can reduce traffic and emissions.
- NYC Case Study: New York City’s congestion pricing program is projected to reduce auto trips by up to 59,000 daily and cut greenhouse gas emissions by 7%. [sfcta.org]
- Revenue Use: Funds raised (estimated $810M–$1.1B annually) are reinvested into public transit improvements. [sfcta.org]
Recommendation: Pilot congestion pricing in downtown Los Angeles, San Francisco, San Jose, and Oakland, with equity-focused exemptions for residents, ensuring the program supports environmental concerns.
12. Promote Eco-Driving Education
Driver behavior has a major impact on fuel efficiency and emissions.
- DOE Data: Aggressive driving can reduce fuel economy by 15–30% on highways and 10–40% in city traffic. [afdc.energy.gov]
- Training Programs: Fleets using driver feedback and training have seen fuel savings of up to 6.6% on average. [afdc.energy.gov]
Recommendation: Launch public campaigns and DMV-endorsed training programs to teach eco-driving techniques like smooth acceleration, reduced idling, and optimal gear shifting.
13. Support Carpooling and Ridesharing
Reducing single-occupancy vehicle trips is key to lowering emissions.
- Federal Study: Incentive-based carpooling programs can reduce VMT and emissions. For example, app-based rewards increased shared rides and reduced private vehicle use in multiple cities. [ops.fhwa.dot.gov]
- Emissions Impact: A Maryland rideshare program reduced 84,000 vehicle miles and 145 kg of emissions daily. [ops.fhwa.dot.gov]
Recommendation: Expand carpool lanes, offer toll discounts for shared rides, and partner with rideshare apps to promote multi-passenger trips.
Conclusion
These strategies combine infrastructure changes, policy enforcement, and smarter traffic management to reduce fuel consumption and smog. By keeping vehicles moving efficiently and holding all vehicles to the same environmental and standards, California can make meaningful progress toward cleaner air and smarter transportation.
But the conversation doesn’t end here.
What solutions do you think California should consider to further reduce smog and improve our environment? Are there innovative models or successful programs from other states or countries that you believe California should adopt?
Share your thoughts, experiences, and ideas in the comments below.
Your input can help shape a cleaner, more efficient future for all Californians—and perhaps inspire change beyond our borders.