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A Serious Critique of Congestion Costs and Induced Vehicle Travel Impacts
Here is a quick share for today. This is an article by Todd Litman critiquing congestion costs and induced vehicle travel impacts:
Quoting from the article:
It is time for planners to rethink the way we evaluate congestion problems and solutions. Vehicle travel is not an end in itself; our ultimate goal is to improve accessibility. Traffic congestion is one constraint on accessibility, but others are more important. For example, the study, “Does Accessibility Require Density or Speed?” found that a given increase in urban density, and therefore proximity, has a far greater impact on overall accessibility than an increase in travel speed, and therefore congestion reductions. This is particularly true of disadvantaged groups who cannot drive or are financially burdened by vehicle expenses.
It is irresponsible for transportation agencies to expand highways in ways that contradict other community goals. If they do nothing, at worst, traffic congestion will maintain equilibrium; people will manage within its constraints. Even better, transportation agencies can invest in resource-efficient alternatives—better walking, bicycling, public transit, and telework opportunities—that improve accessibility, increasing transportation system efficiency.
If we truly want to truly optimize our transportation systems, we need a more comprehensive analysis of impacts and options, including the full costs of urban highway expansions and the full benefits of non-auto mode improvements and TDM incentives. Highway expansion should be a solution of last resort, only implemented when all other solutions have failed and users are willing to pay the full costs through tolls.
It’s time to stop obsessing about congestion and instead strive for efficient accessibility that serves everybody in the community.
Source: A Serious Critique of Congestion Costs and Induced Vehicle Travel Impacts
Some advantages of rail over road transport
In my previous article, I mentioned how rail transport is important as part of a country’s transport system, particularly on land. I also mentioned a study conducted by our undergraduate students that was completed back in April 2012.
Our students conducted a simple survey, as part of their research, to determine the travel times and costs for public transportation between several origin-destination pairs. These O-D pairs were selected to simulate costs and travel times of commutes using either primarily rail or all road transport. Note the choices of either ‘school’ or ‘office’ paired with ‘home’ somewhere in the south of Metro Manila.
Travel time comparisons for commutes using road and rail public transportation – ‘Road’ refers to the entire commute using road-based transport (i.e., buses and jeepneys) while ‘Rail’ refers to commutes utilizing mainly the PNR but with road transport used in the end parts of the journeys (e.g., jeepney ride from near the PNR Espana Station to UST).
Travel cost comparisons for commutes using road and rail public transportation
Relevant to understanding the above are the following
- Fare rates have changed since 2012. However, this presents a constant change over the fares that are being compared so the basic differences will remain the same across origin-destination pairs.
- PNR services had to be discontinued for some time due to derailments because of poor conditions of tracks.
- Road traffic has worsened since 2012 with several “carmaggedon” episodes showing how vulnerable commuters are when using solely road transport.
- Road public transport services are frequent and practically 24/7. PNR services are of very limited frequency. Waiting times for the trains typically add to travel times in the form of delays, which make commuting by rail an unattractive option due to their unreliability of service.
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Caught (up) in traffic 