ICC control . Meanwhile , the less regulated motor carrier industry prospered . As that industry became more regulated , efficiency began to drop . In response , deregulation of both industries began in the late 1970 's and early 1980 's . As carriers were allowed to eliminate unprofitable activities and set their prices based on demand , revenue and investment increased . In the mid-1980 's , the ICC was replaced by the Surface Transportation Board , a regulatory agency that is reduced in size and scope . Today 's...











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