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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
REPORT 
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Publication Number: FHWAHRT13090 Date: April 2016 
Publication Number: FHWAHRT13090 Date: April 2016 
The following table shows axle load spectra cluster assignments for each SPS TPF site. SPS TPF site ID is shown in the first column. Axle load spectra were developed for 25 classaxle combinations listed in the first row and analyzed using statistical clustering technique. Based on the results of the analysis, these load spectra were assigned to different statistical clusters. Each of the 25 classaxle combinations had 3 to 6 clusters representing different axle loading conditions. These clusters are identified in the cells by a number from 1 to 6. For each classaxle, the cluster that had the largest number of SPS TPF sites was called "typical." To identify which cluster is typical in the table, "typical" is included after the cluster number. In addition, when a cluster was formed by a single axle load spectrum, SPS TPF site ID was used to identify the cluster in the table instead of a number.
StateSite  Class 4 Single  Class 5 Single  Class 6 Single  Class 7 Single  Class 8 Single  Class 9 Single  Class 10 Single  Class 11 Single  Class 12 Single  Class 13 Single  Class 4 Tandem  Class 5 Tandem  Class 6 Tandem  Class 7 Tandem 

040100  3  Typical  1  Typical  3  3  Typical  2  Typical  4  1  Typical  5  4  Typical  3  4  1  Typical  2  1  Typical 
040200  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
050200  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
060200  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
080200  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  3  1  Typical  3  Typical  2  1  Typical  1  Typical 
100100  3  Typical  2  4  3  Typical  3  2  Typical  1  Typical  2  3  2  4  1  Typical  4  2 
120100  2  4  3  3  Typical  4  2  Typical  1  Typical  3  Typical  3  1  Typical  2  1  Typical  5  4 
120500  1  3  5  3  Typical  2  Typical  1  1  Typical  2  1  5  1  1  Typical  2  3 
170600  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  2  1  Typical  1  Typical 
180600  3  Typical  2  2  3  Typical  2  Typical  2  Typical  3  3  Typical  3  2  3  Typical  1  Typical  2  1  Typical 
200200  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  2  1  Typical  1  Typical 
220100  3  Typical  3  3  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  2  1  Typical  3  Typical  1  Typical  3  1  Typical 
230500  3  Typical  1  Typical  1  Typical  5  3  2  Typical  1  Typical  4  5  2  3  Typical  1  Typical  1  Typical  1  Typical 
240500  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  2  3  2  3  Typical  1  Typical  1  Typical  1  Typical 
260100  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  4  3  Typical  4  Typical  2  3  Typical  1  Typical  1  Typical  1  Typical 
270500  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  1  3  1  Typical  3  Typical  2  1  Typical  1  Typical 
350100  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  2  2  1  Typical  2  1  Typical  1  Typical  1  Typical 
350500  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  2  3  Typical  4  Typical  3  3  Typical  3  1  Typical  1  Typical 
390100  3  Typical  2  1  Typical  3  Typical  2  Typical  2  Typical  3  3  Typical  3  4  3  Typical  1  Typical  1  Typical  1  Typical 
390200  3  Typical  1  Typical  1  Typical  2  1  2  Typical  3  3  Typical  4  Typical  1  Typical  2  1  Typical  1  Typical  1  Typical 
420600  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  3  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
470600  3  Typical  1  Typical  1  Typical  2  2  Typical  2  Typical  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  5 
480100  3  Typical  1  Typical  1  Typical  3  Typical  1  2  Typical  2  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
510100  3  Typical  1  Typical  1  Typical  3  Typical  2  Typical  2  Typical  1  Typical  3  Typical  3  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
530200  3  Typical  2  1  Typical  1  2  Typical  3  1  Typical  3  Typical  4  Typical  1  Typical  3  Typical  1  Typical  1  Typical  1  Typical 
550100  3  Typical  1  Typical  1  Typical  4  2  Typical  2  Typical  3  3  Typical  3  1  Typical  2  1  Typical  1  Typical  1  Typical 
040100  3  4  5  4  Typical  4  1  Typical  4  1  1  Typical  1  Typical  3  040100  3  4 
040200  4  Typical  2  Typical  2  Typical  4  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  3  040200  4  Typical  2  Typical 
050200  4  Typical  2  Typical  3  4  3  1  Typical  4  3  Typical  3  1  Typical  5  Typical  050200  4  Typical  2  Typical 
060200  4  Typical  2  Typical  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  1  Typical  1  Typical  5  Typical  060200  4  Typical  2  Typical 
080200  3  1  2  Typical  4  Typical  1  1  Typical  3  Typical  3  Typical  1  Typical  1  Typical  4  080200  3  1 
100100  4  Typical  2  Typical  4  4  Typical  2  Typical  4  5  4  1  Typical  1  Typical  2  100100  4  Typical  2  Typical 
120100  6  3  3  4  Typical  2  Typical  2  5  3  Typical  1  Typical  1  Typical  3  120100  6  3 
120500  4  Typical  1  2  Typical  1  5  4  3  Typical  1  1  Typical  1  Typical  1  120500  4  Typical  1 
170600  3  2  Typical  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  5  Typical  170600  3  2  Typical 
180600  2  1  2  Typical  4  Typical  2  Typical  3  4  3  Typical  3  1  Typical  5  Typical  180600  2  1 
200200  4  Typical  2  Typical  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  5  Typical  200200  4  Typical  2  Typical 
220100  2  1  3  4  Typical  3  1  Typical  4  4  1  Typical  1  Typical  5  Typical  220100  2  1 
230500  4  Typical  1  1  5  4  1  Typical  1  5  1  Typical  1  Typical  5  Typical  230500  4  Typical  1 
240500  3  1  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  4  240500  3  1 
260100  1  1  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  2  2  2  5  Typical  260100  1  1 
270500  2  1  1  1  2  Typical  1  Typical  2  3  Typical  2  1  Typical  4  270500  2  1 
350100  3  1  2  Typical  2  2  Typical  1  Typical  3  Typical  3  Typical  1  Typical  1  Typical  3  350100  3  1 
350500  4  Typical  3  3  4  Typical  3  1  Typical  4  3  Typical  1  Typical  1  Typical  5  Typical  350500  4  Typical  3 
390100  4  Typical  2  Typical  3  4  Typical  2  Typical  1  Typical  4  2  2  3  3  390100  4  Typical  2  Typical 
390200  4  Typical  1  2  Typical  4  Typical  1  1  Typical  3  Typical  2  2  3  5  Typical  390200  4  Typical  1 
420600  4  Typical  2  Typical  2  Typical  4  Typical  2  Typical  3  3  Typical  3  Typical  1  Typical  1  Typical  5  Typical  420600  4  Typical  2  Typical 
470600  4  Typical  2  Typical  2  Typical  4  Typical  2  Typical  5  4  3  Typical  1  Typical  1  Typical  5  Typical  470600  4  Typical  2  Typical 
480100  5  2  Typical  4  4  Typical  2  Typical  1  Typical  5  3  Typical  1  Typical  1  Typical  5  Typical  480100  5  2  Typical 
510100  4  Typical  2  Typical  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  4  510100  4  Typical  2  Typical 
530200  3  2  Typical  2  Typical  4  Typical  1  1  Typical  3  Typical  2  1  Typical  3  3  530200  3  2  Typical 
550100  3  1  2  Typical  4  Typical  2  Typical  1  Typical  3  Typical  3  Typical  2  1  Typical  4  550100  3  1 