What characteristic indicates a ramming attack may be imminent?

A lack of observable indicators before the attack is a significant characteristic that suggests a ramming attack may be imminent. This absence of warning signs can complicate preventive measures, as attackers often seek to exploit opportunities to strike unexpectedly. In the case of ramming attacks, they are typically executed quickly and without extensive planning or forewarning, which makes the suddenness critical to their success.

While presence of explosives, detailed online threats, and intelligence reports may indicate potential threats or other forms of attacks, they do not directly suggest that a ramming attack is specifically about to occur. The unpredictability associated with ramming attacks is what makes the lack of observable indicators particularly concerning. It emphasizes the need for heightened awareness and readiness among security personnel to react to potential threats that are not preceded by typical signs of aggression.