49 Ill. App. 3d 940 - O'BRIEN v. Walker’s Empirical Analysis
1977
Citation profile
82 state decisions
How this case has been cited
Cited by 82 later decisions — most recently April 2020 · most notably 87 Ill. App. 3d 214 - Spencer v. COMM. HOSPITAL OF EVANSTON (1980), 81 Ill. App. 3d 1031 - Cedric Spring & Associates, Inc. v. N.E.I. Corp. (1980)
82 state decisions
Later decisions citing this case, by decade. The current decade is in progress, and our corpus holds fewer opinions from the most recent years, so the latest bars are undercounted — not a real decline.
Relationships
Relies on 22 Ill. 2d 175 - The People v. Poland · 94 Ill. App. 2d 43 - Levine v. Pascal · 59 Ill. 2d 102 - People v. Armour · 36 Ill. 2d 263 - Sommese v. Maling Bros., Inc. · 16 Ill. App. 3d 89 - Goldstein v. Hertz Corp.
Most-quoted passages
The sentences later courts lift from this opinion, ranked by how many decisions quote each — the parts of the opinion doing the work. These counts are smaller than the citation total above because most of the 82 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.
““Speed is generally recognized as a subject about which a layman may express an opinion. [Citation.] A witness is competent to testify as to the rate of speed of a moving object if he is of ordinary intelligence and possessed an opportunity for observation. [Citation.] The duration of a witness’s period of observation [citation] or the fact that the witness does not drive but only observes as a bystander [citation] goes to the weight rather than the admissibility of the evidence.””
1 later decision quote this exact passage · from the majority
How this case has been treated — in progress
Whether each later court followed, distinguished, criticized, or overruled this decision. The treatment classification (task #35) runs highest-cited cases first and lights up here as it reaches this one.