Sunday, April 21, 2024
Hawai'i Free Press

Current Articles | Archives

Thursday, August 4, 2016
Honolulu Green Light-Red Light Ratio Designed to Jam Up Traffic
By Panos Prevedouros PhD @ 4:58 AM :: 4266 Views :: Honolulu County

Green Light, Red Light Ratio

by Dr Panos Prevedouros, PhD, Fix Oahu, August 3, 2016

Today I received a very interesting question: Has there ever been a study on if the ratio of red lights to green lights that a driver encounters during a trip has an effect on the driver's mood? 

My response follows.

If the ratio green-to-red is 1:1 then this means that the driver has a 50% probability for either green or red as he or she drives down a street with a series of signalized intersections.  This is a poor ratio for a main arterial. A well managed arterial street should have at least a 7:3 green-to-red ratio; that is, many more greens than reds. This requires traffic signal optimization to accomplish.

Surprisingly, Honolulu is often the opposite, which makes it easy to fix, if anyone bothered to work on it. I demonstrated this to reporters in the two times I run for mayor. The best we could do was 1:1 which means the traffic lights operated at random!

As to the behavioral implications, I'm not aware of literature on past research associated with this ratio, but there is plenty of literature associated with congestion and loss of time. Of course one of the most irritating things is when one departs from a green, drives toward the next light which is green, but soon before s/he arrives at the intersection, the light turns red. This is terrible for loss of time, pollution, schedule failure for buses, etc.

The picture below shows the "bandwidths" of green light for both directions of a two way street.  Signal coordination is easy to do for one street, but it's complicated for a large city network, However, computers and software can optimize those with ease.


TEXT "follow HawaiiFreePress" to 40404

Register to Vote


808 Silent Majority

Aloha Pregnancy Care Center


Antonio Gramsci Reading List

A Place for Women in Waipio

Ballotpedia Hawaii

Broken Trust

Build More Hawaiian Homes Working Group

Christian Homeschoolers of Hawaii

Cliff Slater's Second Opinion

DVids Hawaii


Fix Oahu!

Frontline: The Fixers

Genetic Literacy Project

Grassroot Institute

Hawaii Aquarium Fish Report

Hawaii Aviation Preservation Society

Hawaii Catholic TV

Hawaii Christian Coalition

Hawaii Cigar Association

Hawaii ConCon Info

Hawaii Debt Clock

Hawaii Defense Foundation

Hawaii Family Forum

Hawaii Farmers and Ranchers United

Hawaii Farmer's Daughter

Hawaii Federalist Society

Hawaii Federation of Republican Women

Hawaii History Blog

Hawaii Homeschool Association

Hawaii Jihadi Trial

Hawaii Legal News

Hawaii Legal Short-Term Rental Alliance

Hawaii Matters

Hawaii's Partnership for Appropriate & Compassionate Care

Hawaii Public Charter School Network

Hawaii Rifle Association

Hawaii Shippers Council

Hawaii Smokers Alliance

Hawaii State Data Lab

Hawaii Together



Hiram Fong Papers

Homeschool Legal Defense Hawaii

Honolulu Moms for Liberty

Honolulu Navy League

Honolulu Traffic

House Minority Blog

Imua TMT

Inouye-Kwock, NYT 1992

Inside the Nature Conservancy

Inverse Condemnation

Investigative Project on Terrorism

July 4 in Hawaii

Kakaako Cares

Keep Hawaii's Heroes

Land and Power in Hawaii

Legislative Committee Analysis Tool

Lessons in Firearm Education

Lingle Years

Managed Care Matters -- Hawaii

Military Home Educators' Network Oahu

Missile Defense Advocacy

MIS Veterans Hawaii

NAMI Hawaii

National Christian Foundation Hawaii

National Parents Org Hawaii

NFIB Hawaii News

Not Dead Yet, Hawaii

NRA-ILA Hawaii

Oahu Alternative Transport


OHA Lies

Opt Out Today

Patients Rights Council Hawaii

PEACE Hawaii

People vs Machine

Practical Policy Institute of Hawaii

Pritchett Cartoons

Pro-GMO Hawaii


Rental by Owner Awareness Assn

ReRoute the Rail

Research Institute for Hawaii USA

Rick Hamada Show

RJ Rummel

Robotics Organizing Committee

School Choice in Hawaii

Sink the Jones Act

Statehood for Guam

Talking Tax

Tax Foundation of Hawaii

The Real Hanabusa

Time Out Honolulu

Trustee Akina KWO Columns

UCC Truths

US Tax Foundation Hawaii Info

VAREP Honolulu

West Maui Taxpayers Association

What Natalie Thinks

Whole Life Hawaii