This is a link to the annual study of traffic congestion prepared by Texas A&M University, in conjunction with INRIX, titled the Urban Mobility Report. This is the most recent issuance of the report, dated August 2019; data are for CY 2017.
To summarize the report with respect to Boston:
Out of 47 metro areas, Boston is ranked #6 in Yearly Delay (hours) per auto commuter; Travel Time Index Boston is ranked #19; Excess fuel per auto commuter (gallons) ranked #7; Congestion Cost per auto commuter, ranked #8.
pdf p. 28
Out of 15 large metro areas, Travel delay (in hours) ranked #11; Excess fuel consumed ranked #11; Truck congestion cost #11; Total congestion cost #11.
pdf p. 32
Freeway travel time index, Boston is ranked #24 of 101 areas.
pdf p. 36
Stellar -- there is something wrong with the statistics which you quoted
If Boston is #6 in Yearly Delay hours from a sample of 47 Metro Areas -- how is it possible to also be
#11 from a sample of 15 Large Metro Areas
Presumably the 15 are a subset of the 47 -- in that case there can only be 5 of the 47 areas with longer yearly delay hours and even if they are all Large Metro Areas -- Boston can be no lower than 6th
Actually -- Boston is only to be compared to the others in the 15 Large Metros [>3M] for each of the relevant tables in the report
National Congestion Tables
Table 1. What Congestion Means to You,
2017 Urban Area Yearly Delay per Auto Commuter Travel Time Index Excess Fuel per Auto Commuter Congestion Cost per Auto Commuter Hours Rank Value Rank Gallons Rank Dollars Rank
Very Large Average (15 areas) 83 1.35 32 1,730
Los Angeles-Long Beach-Anaheim CA 119 1 1.51 1 35 4 2,676 1
San Francisco-Oakland CA 103 2 1.50 2 39 1 2,619 2
Washington DC-VA-MD 102 3 1.35 7 38 2 2,015 3
New York-Newark NY-NJ-CT 92 4 1.35 7 38 2 1,947 4
Boston MA-NH-RI 80 6 1.30 19 31 7 1,580 8
Table 2. What Congestion Means to Your Town,
2017 Urban Area Travel Delay Excess Fuel Consumed Truck Congestion Cost Total Congestion Cost (1,000 Hours) Rank (1,000 Gallons) Rank ($ million) Rank ($ million) Rank
Very Large Average (15 areas) 309,400 110,000 $657 $6,248
Los Angeles-Long Beach-Anaheim CA 971,478 1 256,931 2 2,027 1 19,490 1
New York-Newark NY-NJ-CT 811,609 2 323,712 1 1,744 2 16,466 2
Chicago IL-IN 352,759 3 144,987 3 753 3 7,150 3
Miami FL 265,947 4 103,239 4 565 4 5,367 4
San Francisco-Oakland CA 253,838 5 95,037 6 547 5 5,175 5
Washington DC-VA-MD 247,811 6 89,885 7 527 6 5,010 6
Houston TX 247,440 7 95,940 5 522 7 4,982 7
Atlanta GA 237,405 8 76,874 10 497 8 4,754 8
Dallas-Fort Worth-Arlington TX 224,883 9 79,677 9 471 9 4,511 9
Philadelphia PA-NJ-DE-MD 194,655 10 80,817 8 424 10 3,967 10
Boston MA-NH-RI 189,426 11 74,143 11 404 11 3,829 11
Table 3. How Reliable is Freeway Travel in Your Town,
2017 Urban Area Freeway Planning Time Index Freeway Commuter Stress Index Freeway Travel Time Index Value Rank Value Rank Value Rank
Very Large Average (15 areas) 2.13 1.55 1.44
Los Angeles-Long Beach-Anaheim CA 2.87 1 1.93 2 1.80 1
San Francisco-Oakland CA 2.69 2 1.97 1 1.67 2
San Diego CA 2.28 7 1.54 9 1.47 9
Seattle WA 2.28 7 1.62 6 1.48 7
Washington DC-VA-MD 2.27 9 1.54 9 1.45 10
Atlanta GA 2.10 12 1.46 17 1.37 14
New York-Newark NY-NJ-CT 2.05 14 1.49 14 1.40 12
Miami FL 2.02 15 1.47 16 1.34 18
Phoenix-Mesa AZ 1.97 17 1.54 9 1.37 14
Houston TX 1.92 19 1.44 18 1.35 16
Boston MA-NH-RI 1.89 20 1.37 22 1.28 24
Now -- assuming that the above is reliable and consistent -- Boston ranks no worse than 6th in Congestion -- as would be consistent with one of the largest Urban Areas [CSA] in the country*1 -- ranking #6
In fact Boston's Congestion is consistently below the Average of its peers in nearly all the categories
U.S. Population – Combined Statistical Area Population
Rank
| Combined statistical area | 2010 Census | 2018 Estimate | Growth (%) |
1 | New York-Newark, NY-NJ-CT-PA | 23,076,664 | 23,522,861 | 1.9 |
2 | Los Angeles-Long Beach, CA | 17,877,006 | 18,764,814 | 5 |
3 | Chicago-Naperville, IL-IN-WI | 9,840,929 | 9,866,910 | 0.3 |
4 | Washington-Baltimore-Arlington, DC-MD-VA-WV-PA | 9,051,961 | 9,797,063 | 8.2 |
5 | San Jose-San Francisco-Oakland, CA | 8,153,696 | 8,841,475 | 8.4 |
6 | Boston-Worcester-Providence, MA-RI-NH-CT | 7,893,376 | 8,285,407 | 5 |