Maintenance Technician Staffing Levels for Modern Public Transit Fleets (2016) / Chapter Skim
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4Analysis of the National Transit Database and Other Data Process The research team used the 2010 National Transit Data base (NTD) as the core data source for the initial review of maintenance staffing–related data.
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5 Table 1. Median and average measures of maintenance staffing levels at 321 transit agencies.
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6Min, 806 Min, 758 Min, 436 Min, 502 Min, 87 Min, 178 Min, 40 Max, 1672 Max, 1533 Max, 2120 Max, 3248 Max, 1459 Max, 2399 930 1286 1239 992 739 715 594 R² = 0.5946 0 500 1000 1500 2000 2500 3000 3500 An nu al m ai nt en an ce ho ur sp er re ve nu e ve hi cl es op er at ed Agency size by # of VOMS Median Trendline Figure 3. Annual maintenance hours per revenue vehicles operated by agency size, 2010.
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7 Min, 3987 Min, 2922 Min, 3239 Min, 1303 Min, 2863 Min, 1591 Min, 821 Max, 8125 Max, 11642 Max, 15713 Max, 16798 Max, 27135 5918 4652 5302 5618 7102 7407 7942 R² = 0.7198 0 5000 10000 15000 20000 25000 30000 An nu al re ve nu e ho ur sp er m ai nt en an ce em pl oy ee Agency size by # of VOMS Median Trendline Figure 5. Annual revenue hours per maintenance employee by agency size, 2010.
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8Min, 51 Min, 8 Min, 11 Min, 21 Min, 9 Max, 721 Max, 555 Max, 666 298 187 214 153 159 R² = 0.6991 0 100 200 300 400 500 600 700 800 Bo om 20% (<11.8 mph) Second Quin le (11.8–13.0 mph)
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9 Min, 240 Min, 43 Min, 40 Min, 224 Min, 87 Max, 2120 Max, 3248 Max, 2288 Max, 1763 878 779 971 686 684 R² = 0.3711 0 500 1000 1500 2000 2500 3000 3500 Bo om 20% (< 11.8 mph) Second Quin le (11.8–13.0 mph)
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10 Min, 1261 Min, 1303 Min, 1309 Min, 2012 Min, 821 6375 7861 7008 7698 5695 R² = 0.0705 0 5000 10000 15000 20000 25000 30000 Bo om 20% (< 11.8 mph) Second Quinle (11.8–13.0 mph)
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11 The correlation predicted appeared by comparing mea sures of revenue miles and number of vehicles, but not rev enue hours. In other words, a more urban duty cycle indicates a generally high staffing level when measured by maintenance hours per vehicle mile (or per vehicle)
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12 Min, 190 Min, 583 Min, 298 Min, 181 Min, 106 Max, 14295 Max, 6581 Max, 8738 Max, 15621 3437 2984 2527 2029 2099 R² = 0.9225 0 2500 5000 7500 10000 12500 15000 17500 20000 Bo om 20% (< 17.1% Spare Ra o) Second Quin le (17.1–22.6%)
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13 Min, 11584 Min, 16420 Min, 17285 Min, 30657 Min, 17585 Max, 344731 67969 83613 90901 125150 123426 R² = 0.9141 0 50000 100000 150000 200000 250000 300000 350000 400000 Bo om 20% (< 17.1% Spare Ra o) Second Quin le (17.1–22.6%)
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14 Table 3. R2 values for 2010 NTD data (321 agencies with >10 vehicles operated)
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