Final answer:
A left turn across traffic is dangerous because it involves crossing oncoming lanes, requiring drivers to judge speed and distance correctly while also navigating the actions of other drivers and pedestrians. Lack of a traffic signal exacerbates this danger, as shown by high accident rates and pedestrian risk at such intersections.
Step-by-step explanation:
Making a left turn across traffic is dangerous because it involves several risks that can lead to accidents or injuries. One of the primary dangers is that the turning vehicle must cross lanes of oncoming traffic, which can lead to collisions if the turn is not timed correctly or if oncoming vehicles are traveling too fast or are not observed. This maneuver requires high levels of attention, accurate judgment of the speed and distance of oncoming cars, and a clear understanding of right-of-way rules. Moreover, intersections without a dedicated left-turn signal are especially perilous, as they demand that drivers negotiate the turn amid the variable speeds and sometimes unpredictable behaviors of oncoming drivers.
Additionally, pedestrians crossing at such intersections face significant risks. Without a traffic signal to manage the flow and timing of crossing pedestrians, they may be forced to dodge traffic, increasing the likelihood of pedestrian-vehicle incidents. The installation of a traffic signal can mitigate these risks by providing clear directives to both pedestrians and drivers seeking to navigate the intersection safely.
The dangers of such intersections are highlighted by their accident history, as noted by police reports indicating that a traffic accident occurs at least three times a month, with at least one resulting in a loss of life. These statistics underscore the need for improved traffic control measures to enhance safety for all users.