On September 7, 1978 an accident occurred at the intersection of Lindberg Boulevard and Trotter Way, in north St. Louis County. Lindbergh, also known as Highway 67, is a four lane highway with a left turn lane. It runs east and west at this point. Trotter Way runs into Lindbergh from the south, with a continuation into a parking lot on the north side of Lindbergh. The intersection is controlled by a stop light. The streets are relatively level and the day was clear.
Plaintiff-Appellant Carol Thurman testified that she was leaving the parking lot intending to turn left onto Lindbergh. She signaled a left turn on her indicator and waited at the curb line for the light to turn green. She then waited until a car northbound on Trotter Lane completed a left turn into the westbound lane of Lindbergh. She then proceeded at a speed of 3 to 5 miles per hour onto Lindbergh when she was struck in the center westbound lane by a car driven by the defendant and heading west on Lindbergh. The left front portion of her car was severely damaged. She testified that she looked and saw one or more ears stopped in the westbound lane of Lindbergh nearest the curb, cars stopped in the eastbound lane of Lindbergh, and the car headed north on Trotter Lane, but saw no car approaching in the center westbound lane.
Defendant-Respondent Melba Anderson testified that she was going west on Lindbergh at a speed of 35 miles per hour. The light was green. She did not brake, but did take her foot off the accelerator as she approached the intersection. She did not see the plaintiffs car before the collision.
The case was submitted to the jury on an instruction (MAI 17.01) reading as follows:
Your verdict must be for plaintiff if you believe:
First, defendant violated the traffic signal, and
Second, defendant was thereby negligent, and
Third, as a direct result of such negligence plaintiff sustained damage.
* [unless you believe plaintiff is not entitled to recovery by reason of Instruction Number 9 ...)].
The court also gave, at defendant’s request, a contributory negligence instruction, reading as follows:
INSTRUCTION NO. 9
Your verdict must be for defendant on plaintiff Carol Thurman’s claim for damages if you believe:
First, plaintiff Carol Thurman failed to keep a careful lookout, and
Second, plaintiff Carol Thurman was thereby negligent, and
Third, such negligence of plaintiff Carol Thurman directly caused or directly contributed to cause any damage Carol Thurman may have sustained.
The jury returned a verdict for the defendant on the claims of Thurman and her husband. The Court of Appeals, Eastern District, affirmed summarily. We granted transfer to explore possible conflict with Zalle v. Underwood, 372 S.W.2d 98 (Mo.1963). We agree that there is a conflict and, considering that Zalle properly states the law, reverse and remand for a new trial.
In Zalle, it was held that, to support a contributory negligence instruction on failure to keep a careful lookout, the evidence must support a finding that a driver had the means and ability to have avoided a collision. Means and ability include sufficient time and distance considering the movement and speed of the vehicles. There was no evidence to show that either party saw the other. There was no expert evidence on how far a car will travel at various speeds before stopping. Nor was there evidence to show the distance between the vehicles at the material times. The evidentiary similarities between Zalle and the instant case are striking.
*808Here the plaintiff testified that the light was green in her favor. Her testimony is supported by the only independent eyewitness, who was stopped in the eastbound lane of Lindbergh. If this testimony is true, the plaintiff’s duty to keep a lookout is substantially affected.1 She has to take account of cars coming from three different directions, giving greatest concern to cars proceeding north on Trotter Way which might turn left in front of her or proceed across her intended course. She is not expected to look in three directions at once.2 She was justified in assuming that ears going in the opposite direction would obey the signal, at least until a driver gave positive indication to the contrary.3 There is no evidence to show that defendant gave any indication that she would not obey the signal, at a time when the plaintiff could have done anything to avoid the accident.
Plaintiff testified without contradiction that she was traveling no faster than 3 to 5 miles per hour. At this speed she would travel 7.7 feet per second. Giving attention to reaction time, she very likely could not stop, after entering the intersection, until she reached the center lane. The question of the defendant’s position, then, is all important. In order to show contributory negligence in failure to keep a careful lookout, defendant must establish her position in the road, and must then demonstrate that plaintiff, exercising the highest degree of care, could have avoided the accident.
The dissent, in suggesting that the plaintiff “could have averted the collision by appropriate evasive action, including by remaining stopped and not entering the intersection at all,” fails to perceive that, if the light were green in the plaintiff’s favor, she had every right to enter the intersection even though she might have seen the defendant approaching. The only exception would arise if it should have been apparent to the plaintiff that the defendant would not respect the traffic signal. There is absolutely no evidence in the record which would support this proposition. Of the cases cited in the dissent, only Stanfill v. City of Richmond Heights, 605 S.W.2d 501 (Mo.App.1980) involved an intersection protected by traffic signals, and the collision was with an emergency vehicle which was sounding a siren and displaying a flashing red light. The dissent fails to demonstrate why Zalle v. Underwood, supra, is not applicable.
The jury of course could disbelieve the plaintiff and her witness, and could believe that the light was green in favor of the defendant and against the plaintiff. The defendant, however, did not submit failure to obey the traffic signal as a ground of contributory negligence. Under the facts and the authority of Zalle, the contributory negligence submission used was inappropriate. See also Bolhofner v. Jones, 482 S.W.2d 80 (Mo.App.1972). The error is not in the form of the instruction but rather in the absence of supporting evidence. There was no factual showing sufficient to support a finding that the plaintiff could have avoided the collision had she kept a more careful lookout.
Retrial will be governed by the rules of Gustafson v. Benda, 661 S.W.2d 11 (Mo. banc 1983). We express no opinion as to what submission would be appropriate under that doctrine.
The judgments are reversed and the case is remanded for new trial.
*809RENDLEN, C.J., HIGGINS and BILLINGS, JJ., and MORGAN, Senior Judge, concur.
DONNELLY and WELLIVER, JJ., dissent in separate opinions filed.
GUNN, J., not sitting.