What’s on the Signal Timing poster?

6 numbered steps. Saturation flow first, cycle time last. Measure saturation flow — The discharge rate of a queue once it is moving freely.; Find each flow ratio — Demand flow divided by saturation flow, approach by approach.; Take the critical ratios — One per stage: the worst approach running in that stage.; Add up the lost time — Start-up and clearance losses per stage, plus the intergreens.; Compute the cycle time — Webster: C = (1.5L + 5) divided by (1 − Y).; Split the green — Share effective green in proportion to the critical ratios.. Educational reference. Real signal design also covers pedestrians and safety, under the highway authority's standards.

Who is the Signal Timing poster for?

Signal Timing belongs to the Civil Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning transportation can pin it up — a beginner, a student mid-course, or someone revising years later.

When should you use the Signal Timing poster?

Producing a first cycle time and green split before micro-simulation. A wall chart earns its place by being glanceable from where the work is happening, so Signal Timing belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.

What other posters go with Signal Timing?

CBR & Subgrade, Road Cross Section and Mass Haul sit alongside Signal Timing in the Civil Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.

Is the Signal Timing poster free to download and print?

Yes. Signal Timing downloads as a free PDF with no account, no email and no watermark, like everything else in the Civil Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.

What size does the Signal Timing poster print at?

Signal Timing is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Signal Timing loses nothing.

Signal Timing — free printable poster

Signal Timing — printable engineering wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Signal Timing, step by step

Saturation flow first, cycle time last.

Measure saturation flowThe discharge rate of a queue once it is moving freely.
Find each flow ratioDemand flow divided by saturation flow, approach by approach.
Take the critical ratiosOne per stage: the worst approach running in that stage.
Add up the lost timeStart-up and clearance losses per stage, plus the intergreens.
Compute the cycle timeWebster: C = (1.5L + 5) divided by (1 − Y).
Split the greenShare effective green in proportion to the critical ratios.

Educational reference. Real signal design also covers pedestrians and safety, under the highway authority's standards.

Questions about the Signal Timing poster

What’s on the Signal Timing poster?: 6 numbered steps. Saturation flow first, cycle time last. Measure saturation flow — The discharge rate of a queue once it is moving freely.; Find each flow ratio — Demand flow divided by saturation flow, approach by approach.; Take the critical ratios — One per stage: the worst approach running in that stage.; Add up the lost time — Start-up and clearance losses per stage, plus the intergreens.; Compute the cycle time — Webster: C = (1.5L + 5) divided by (1 − Y).; Split the green — Share effective green in proportion to the critical ratios.. Educational reference. Real signal design also covers pedestrians and safety, under the highway authority's standards.
Who is the Signal Timing poster for?: Signal Timing belongs to the Civil Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning transportation can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Signal Timing poster?: Producing a first cycle time and green split before micro-simulation. A wall chart earns its place by being glanceable from where the work is happening, so Signal Timing belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
What other posters go with Signal Timing?: CBR & Subgrade, Road Cross Section and Mass Haul sit alongside Signal Timing in the Civil Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.CBR & Subgrade Road Cross Section Mass Haul
Is the Signal Timing poster free to download and print?: Yes. Signal Timing downloads as a free PDF with no account, no email and no watermark, like everything else in the Civil Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Signal Timing poster print at?: Signal Timing is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Signal Timing loses nothing.Printing guide

Signal Timing, step by step

Questions about the Signal Timing poster

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