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the claim

Building new roads or widening existing ones always reduces traffic congestion.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 4 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that building new roads or widening existing ones always reduces traffic congestion?

No. A 2011 American Economic Review study reported in a reference article found vehicle travel increases in direct proportion to lane-kilometers, implying new roads and widening only restore prior peak congestion; a Skeptics.SE review adds that induced-traffic elasticities vary widely and are often below 1, so capacity can sometimes reduce congestion. Together these contradict the claim that new roads or widening always reduce congestion.

Verdict: REFUTED · 0 sources for, 4 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 4
Traffic congestion
Get citation
Traffic congestion. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Traffic_congestion

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More against · 3
Does building roads increase traffic to the same point?
2023
Get citation
Does building roads increase traffic to the same point?. (2023). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/55623/does-building-roads-increase-traffic-to-the-same-point

Indonesia - Strategic Roads Infrastructure Project : resettlement plan (Vol. 12 of 18) : Sub proyek Palmerah ring road Jambi
2006
Get citation
Indonesia - Strategic Roads Infrastructure Project : resettlement plan (Vol. 12 of 18) : Sub proyek Palmerah ring road Jambi. (2006). documents.worldbank.org. http://documents.worldbank.org/curated/en/371741468049858333

Indonesia - Strategic Roads Infrastructure Project : resettlement plan (Vol. 6 of 18) : Sub proyek semarang-demak
2006
Get citation
Indonesia - Strategic Roads Infrastructure Project : resettlement plan (Vol. 6 of 18) : Sub proyek semarang-demak. (2006). documents.worldbank.org. http://documents.worldbank.org/curated/en/181561468051556283

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