et 
5 
, 
Frequency Rate per 
— 7 10,000 Cars — 
1° 
Jr 
WW 
Severity Rate per 
“0 Cars 
1922 
39.5 
2.45 
.923 1924 
92.8 84.0 
Accidents per 10,000 Cars 
3.63 2.58 
Days Lost per 10 Cars 
1925 
79.9 
2.86 
CHART 53 ACCIDENT FREQUENCY AND SEVERITY RATES 18 TERMS oF Propucrion 
From 1922 To 1926 oF 4 CoMPANIES MANUFACTURING AUTOMOBILES. NUMBER OF 
EMPLOYEES, 14,427 
Accident frequency rate decrease .....................1ILO per cent 
Accident severity rate increase .. hese 7.3 o 
14