Signal jamming finds diverse applications in various environments, addressing specific needs for control and security. In educational settings, jamming is employed to restrict mobile phone usage during exams, ensuring a fair testing environment. A jammer cell phone disrupts mobile phone signals within its range, providing a controlled environment where cellular communication is restricted or blocked. Theatres and cinemas utilize signal jammers to enhance audience focus by preventing disruptive phone activities. In confidential business meetings or government facilities, jamming is crucial to thwart potential eavesdropping attempts, safeguarding sensitive information. Correctional facilities deploy jammers to inhibit illicit communication among inmates. Additionally, signal jamming is employed in military operations to maintain operational security. While beneficial in controlled scenarios, the use of signal jammers necessitates careful consideration of legal and ethical implications to strike a balance between security requirements and individual freedoms.

It is really very boring to wait at the signal especially when the sun is scorching on your head.
But we have a systematic traffic arrangement which we all should follow.
I have to commute on daily basis from home to work so I have to wait at the signal for around 20 minutes daily.