CAN EMISSIONS CONTROL ALSO CONTROL TRAFFIC VOLUME?
CAN EMISSIONS CONTROL ALSO CONTROL TRAFFIC VOLUME?
What if the solution to both traffic congestion and air pollution is actually very simple: ban vehicles that fail emissions tests. No emissions pass, no registration. No registration, no driving on public roads. If these vehicles cannot go out, traffic volume goes down — and so does pollution. Why, then, is this not yet the standard policy?
We often treat traffic and air pollution as separate problems. One is given traffic schemes like color coding, while the other is left to periodic smoke testing that everyone knows is easy to manipulate. But what if we connected the two through one strict rule: only clean vehicles deserve access to public roads?
The logic is straightforward. High-polluting vehicles are usually old, poorly maintained, and inefficient. They release dangerous pollutants like nitrogen oxides and fine particulate matter that penetrate deep into the lungs. These are known to trigger asthma, heart disease, and other respiratory illnesses. Removing them from circulation immediately cleans the air and reduces the number of vehicles competing for limited road space.
This idea is not new. London’s Ultra-Low Emission Zone (ULEZ) now covers all of Greater London and charges or effectively bans non-compliant vehicles. Vehicle compliance has reportedly reached about 96 percent, and tens of thousands of old vehicles have been scrapped or upgraded. Nitrogen dioxide levels have significantly declined. Several European cities operate similar low-emission zones. In China, vehicles that fail emissions tests are simply not allowed back onto the road. In many U.S. states, failing emissions means no registration.
So yes — it has been done. And yes — it works.
Will this automatically solve traffic? Not completely. Evidence shows that traffic volume drops moderately, not dramatically, because newer vehicles still replace older ones. But even a moderate reduction matters when roads are already operating beyond capacity. More importantly, the quality of traffic changes — fewer smoky vehicles, better engines, lower fuel waste.
There is, of course, the issue of fairness. Lower-income drivers usually own older cars. A sudden ban without support would be unjust. That is why other countries pair emissions limits with scrappage programs, subsidies for cleaner vehicles, or strong public transport alternatives. A policy that is environmentally sound but socially blind will not survive.
That is why I strongly believe this should not be handled by one agency alone. The DENR, DOST, DOTr, and MMDA should immediately form a joint task force to design a Philippine-appropriate system: strict emissions enforcement, digital registration control, roadside monitoring, and real penalties — not just on paper.
This approach is also far more rational than number-coding schemes that punish clean cars while letting dirty ones roam freely on certain days. Color coding controls when you drive but ignores what you drive. Emissions-based control regulates both the machine and its environmental cost.
Let us not forget that air pollution is not a minor inconvenience. It is a major public-health risk and a silent killer. Every smoky vehicle on the road is a moving health hazard.
So I ask again: if a single rule can reduce traffic, improve air quality, lower disease risk, and modernize our vehicle fleet — why are we still hesitating? Is it lack of coordination? Political fear? Or resistance from vested interests?
Sometimes, the most powerful solutions are also the simplest. Perhaps it is time we finally choose clean air and discipline over convenience and disorder.
RAMON IKE V. SENERES
www.facebook.com/ike.seneres iseneres@yahoo.com senseneres.blogspot.com 09088877282/10-15-2026
