Edited sentence: A continued lack of such standard, or its effective enforcement by both police and judges may substantially diminish the legality of humans ever driving in the future.Common law precedent was eroded through the creation of distinctions where none really exists (i.In a trend epitomized by the Great American streetcar scandal, and accelerated by red scare hysteria, automobile interests became very powerful through the 1980s, even filing one-sided amicus curiae briefs to narrow precedent making it difficult for all prior types of users to exercise their easement to the roadways; its goal was towards making all roads controlled-access highways.In at least one jurisdiction, it could no longer be said "as a matter of law" whether a cyclist is a discernible object for which a motorist with proper lookout had a duty to see; an intolerant jury could fault a cyclist for "being in the way" notwithstanding that objects are less discernible and more "sudden" as one travels with reckless speed.The ACDA common law rule is more critical than ever to public safety in such multi-modal environment.The principle special interest lobby organization through which this was done is the American Highway Users Alliance.These successes in-part contributed to mass congestion, smog, high fuel prices, and obesity, which waned the power of this lobby, and now green multi-modal transportation is Federally encouraged.pedestrian v.visibility of cyclist v.warning triangle)