Safety Abbreviations
HSM
What is Highway Safety Manual?
The number of warrants for traffic control signals.
What is nine?
The only state in the western district to border two other states in the western district.
What is Oregon?
PHF is a common abbreviation for this factor.
What is Peak Hour Factor?
This guide has been based on the current signalized intersection experience of practicing traffic engineers across Canada.
What is the Canadian Capacity Guide for Signalized Intersections?
CMF
What is Crash Modification Factor?
The W1-8 sign features a symbol that is also the name of a well-known oil company.
What is Chevron?
The states that make up the Western District.
What are California, Oregon, Washington, Hawaii, Alaska.
Another name for Directional Split.
D-Factor?
In Canada, the abbreviation RTOR means this.
What is Right Turn on Red?
SPF
What is Safety Performance Function?
This color is assigned to recreation and cultural interest uses.
What is brown?
This region of the western district has the most student chapters.
What is California (Region 2)/Southern California
Another name for Design Hour Factor.
Bicycles are considered to be this in all Canadian jurisdictions.
What are vehicles?
CRF
What is Crash Reduction Factor?
The number of colors assigned for use in conveying traffic control information.
What is 13?
These two regions have one student chapter each.
What are the Alaska region and the Hawaii region?
The saturation flow rate equation includes the term fHV, also known as this factor.
What is the Heavy Vehicle Factor?
A measure of the variability of traffic flow over an hour.
What is the Peak Hour Factor?
LOSS
What is Level of Service of Safety?
Traffic Signal Warrant 9 is intended for application on minor streets near these applications.
What are rail-highway grade crossings?
As of 2025 the Western ITE newsletter is in this volume.
What is 77?
Capital "W" is the HCM term for this.
What is Weaving Intensity Factor?
Known as the signal change interval in the USA.
What is the Intergreen Period?