Safety First
A diagram showing geometry, traffic controls, and collision patterns at a location.
What is a collision diagram?
This type of speed represents the actual speed drivers travel under free‑flow conditions and is often estimated using the 85th percentile.
What is operating speed?
This force pulls objects toward the center of Earth.
What is gravity?
This 1980s arcade game featuring a yellow circle eating dots defined early gaming culture.
What is Pac‑Man?
A countermeasure with a CMF of 1.0 has this effect on collisions.
What is no effect?
This area beyond the travelled way should be free of fixed objects to reduce the severity of run‑off‑the‑road collisions.
What is the Clear Zone?
This branch of math studies the likelihood of events occurring.
What is probability or statistics?
This 2000s vampire romance series became a Millennial cultural phenomenon.
What is Twilight?
In economic appraisal, this value represents the monetary burden of collisions on society, including human, economic, and system costs.
What is societal cost?
This modern concept replaces reliance on the 85th percentile by defining the speed drivers should travel based on land use, multimodal activity, and street function.
What is target speed?
This semiconductor device allows current to flow in only one direction.
What is a diode?
This 2010s streaming series about 1980s kids fighting supernatural forces united multiple generations.
What is Stranger Things?
This concept describes how multiple imperfect safety layers, described as holes, can align to allow a collision to occur.
What is the Swiss Cheese Model?
These roadway treatments—such as chicanes, speed humps, and raised crosswalks—alter the vehicle path to reduce speeds.
What are deflections?
This engineering concept quantifies how sensitive a system’s output is to small changes in input parameters.
What is sensitivity analysis?
This 2000s Canadian teen drama became a Millennial rite of passage and launched several major actors.
What is Degrassi: The Next Generation?