The level of for-hire freight shipments in August measured by the Freight TSI (131.1) was 7.4% below the all-time high level of 141.6 in August 2019 (Table 2A). BTS’ TSI records begin in 2000. See historical TSI data.

 

The July index was revised to 132.8 from 128.9 in last month’s release. This was largely due to a revision in the (non-seasonally adjusted) ATA truck tonnage index from an advanced estimate of a 2.5% decrease, to a final estimate of a 1.3% increase.   Monthly numbers for May and June were revised up slightly. March and April were revised down slightly.

 

BTS is withholding the scheduled release of the passenger and combined indexes for August. The passenger index for August is a statistical estimate of airline passenger travel and other components based on historical trends up to July 2020. The statistical estimate does not fully account for the rapidly changing impacts of the coronavirus on the historical trend. Air freight for August is also a statistical estimate. Since air freight makes up a smaller part of the freight index, the freight TSI is being released as scheduled with the air freight estimate included. The July passenger and combined indexes are available on the BTS website.

 

The Freight TSI measures the month-to-month changes in for-hire freight shipments by mode of transportation in tons and ton-miles, which are combined into one index. The index measures the output of the for-hire freight transportation industry and consists of data from for-hire trucking, rail, inland waterways, pipelines and air freight. The TSI is seasonally-adjusted to remove regular seasons from month-to-month comparisons.

 

Analysis: The Freight TSI decreased 1.3% in August from July due to declines in water, pipeline and trucking, despite growth in rail intermodal, rail carload, and air freight. The August decrease took place against the background of mixed results in other indicators.

 

The Institute for Supply Management Manufacturing (ISM) index was up by 1.8 points to 56.0, indicating accelerating growth in manufacturing.  The Federal Reserve Board Industrial Production (IP) Index grew 0.4% in August reflecting an increase of 1.0% in manufacturing, while mining decreased by  2.5% and utilities by 0.4%. Housing starts declined by 22.6%.

 

Personal Income was down 2.7%, more than accounted for by decreased unemployment insurance benefits, as noted by the Bureau of Economic Analysis.

 

Although the August Passenger TSI is being withheld because of the difficulty of estimating air passenger miles and other modes, the July index is now being released. The index increased 37.5% from June to July, the third consecutive increase following three months of decline, which left it below any level the Passenger TSI had been before the pandemic for the fifth consecutive month. Air passenger and transit were up in July, but rail passenger decreased.

 

Trend: The August decrease in the Freight index followed three consecutive monthly increases. The index has now declined in four of the eight months of 2020, for a total decrease of 4% in 2020.  The index remained 3.7% below its pre-pandemic level in February, and 4.2% below its recent peak in January. However, it is 4.4% above its pandemic low point in April.  It is now 7.4% below its all-time high in August 2019. The index was below the levels of every month from November 2017 to March 2020 for the fifth consecutive month. However, it was above every level before August 2017 when the index reached 129.0. For additional historical data, go to TSI data.

 

Index highs and lows: For-hire freight shipments in August 2020 (131.1) were 38.1% higher than the low in April 2009 during the recession (94.9). The August 2020 level was 7.4% below the historic peak reached in August 2019 (141.6) (Table 1A).

 

Year-to-date: For-hire freight shipments measured by the index were down 4.0% in August compared to the end of 2019 (Table 3).

 

Long-term trend: For-hire freight shipments are up 6.4% in the five years from August 2015 and are up 22.6% in the 10 years from August 2010 (Table 5). 

 

Same month of previous year: August 2020 for-hire freight shipments were down 7.4% from August 2019 (Tables 4, 5).

 

The TSI has three seasonally-adjusted indexes that measure changes from the monthly average of the base year of 2000. The three indexes are freight shipments, passenger travel and a combined measure that merges the freight and passenger indexes. See Seasonally-Adjusted Transportation Data for numbers for individual modes. TSI includes data from 2000 to the present. Release of the September 2020 index is scheduled for Nov. 12.

 

Revisions: Monthly data has changed from previous releases due to the use of concurrent seasonal analysis, which results in seasonal analysis factors changing as each month’s data are added.    

 

BTS research has shown a clear relationship between economic cycles and the Freight and Passenger Transportation Services Indexes. See a study of this relationship using smoothed and detrended TSI data. Researchers who wish to compare TSI over time with other economic indicators, can use the FRED database, which includes freight, passenger and combined TSI, and which makes it possible to easily graph TSI alongside the other series in that database. See TSI data on FRED.   

 

For charts and discussion on the relationship of the TSI to the economy, see Transportation as an Economic Indicator: Transportation Services Index.

 

A BTS report explaining the TSI, Transportation Services Index and the Economy, is available for download.

 

	Index	Pct. Change
February	136.1	-0.6
March	135.3	-0.6
April	125.6	-7.2
May	127.0	1.1
June	128.8	1.4
July	132.8	3.1
August	131.1	1.3

SOURCE: Bureau of Transportation Statistics

NOTE: Percent changes based on numbers prior to rounding.

 

Table 1A: Annual High and Low Points in Freight Transportation Services Index, 2009-2020

 

Year	Month	Peak	Month	Bottom
2009	December	101.8	April	94.9
2016	July	125.7	March	120.6
2017	December	133.6	January	124.0
2018	November	139.3	January	131.5
2019	August	141.6	December	136.6
2020 (thru August)	January	136.9	April	125.6

SOURCE: Bureau of Transportation Statistics

 

 

	2017 % Change	2018 % Change	2019 % Change	2020 % Change
January	-0.5	-1.6	0.9	0.2
February	0.6	1.7	-0.9	0.6
March	0.2	1.3	0.5	-0.6
April	0.4	0.1	1.0	-7.2
May	0.2	0.4	-0.1	1.1
June	0.2	0.7	-0.3	1.4
July	1.8	-1.0	0.4	3.1
August	0.5	0.4	1.5	-1.3
September	-0.3	1.1	-2.8
October	1.1	0.8	0.4
November	1.2	0.3	-0.1
December	1.5	-1.3	-1.0

SOURCE: Bureau of Transportation Statistics

 

Table 2A: Freight Transportation Services Index by Month, 2017-2020

	2017	2018	2019	2020
January	124.0	131.5	138.7	136.9
February	124.7	133.8	137.4	136.1
March	125.0	135.5	138.1	135.3
April	125.5	135.7	139.5	125.6
May	125.8	136.3	139.4	127.0
June	126.1	137.2	139.0	128.8
July	128.4	135.8	139.5	132.8
August	129.0	136.3	141.6	131.1
September	128.6	137.8	137.6
October	130.0	138.9	138.1
November	131.6	139.3	138.0
December	133.6	137.5	136.6

SOURCE: Bureau of Transportation Statistics

 

Year	Freight
2011	1.7
2012	-1.8
2013	3.8
2014	2.5
2015	0.2
2016	2.6
2017	3.5
2018	2.0
2019	3.0
2020	-4.0

SOURCE: Bureau of Transportation Statistics

 

 

	August Freight TSI	Percent change from same month previous year
2011	110.7	3.6
2012	112.8	1.9
2013	116.5	3.3
2014	120.8	3.7
2015	123.2	2.0
2016	123.6	0.3
2017	129.0	4.4
2018	136.3	5.7
2019	141.6	3.9
2020	131.1	-7.4

SOURCE: Bureau of Transportation Statistics

NOTE: Percent changes based on numbers prior to rounding.

 

 

Since August ...	Duration in years	Freight TSI Percent change to August 2020
2019	1	-7.4
2018	2	-3.8
2017	3	1.6
2016	4	6.1
2015	5	6.4
2014	6	8.5
2013	7	12.5
2012	8	16.2
2011	9	18.4
2010	10	22.6

SOURCE: Bureau of Transportation Statistics

 

 

Brief Explanation of the TSI

           

The Transportation Services Index (TSI) is a measure of the month-to-month changes in the output of services provided by the for-hire transportation industries.  The freight index measure changes in freight shipments while the passenger index measures changes in passenger travel.

 

The TSI tells us how the output of transportation services has increased or decreased from month to month. The index can be examined together with other economic indicators to produce a better understanding of the current and future course of the economy.   The movement of the index over time can be compared with other economic measures to understand the relationship of changes in transportation output to changes in Gross Domestic Product (GDP).

 

           

The freight transportation index consists of:

 

The index does not include international or coastal waterborne movements, private trucking, courier services, or the US Postal Service.

 

The passenger transportation index consists of:

 

The index does not include intercity bus, sightseeing services, ferry services, taxi service, private automobile usage, or bicycling and other non-motorized transportation.

 

The TSI includes only domestic "for-hire" freight and passenger transportation. For-hire transportation consists of freight or passenger transport services provided by a firm to external customers for a fee. The TSI does not include taxi services, paid ride services in personal motor vehicles (e.g., Uber, Lyft, etc.), intercity bus services, in-house transportation (vehicles owned and operated by private firms for their own use), or noncommercial passenger travel (e.g., trips in the household car).