Key Questions to Ask When Ordering traffic light red and green
Aug. 25, 2025
The “Traffic Light” Approach to Problem Solving | by Naomi Gleit
The “Traffic Light” Approach to Problem Solving
This is a guest post from my friend and Meta’s Chief Information Security Officer, Guy Rosen. All of us in work (and life!) must make and escalate decisions. But decisions usually have multiple options to consider with different tradeoffs. Enter Guy’s “traffic light” approach, which uses the colors red, yellow and green to visually represent and evaluate various options.
If you want to learn more, please visit our website FAMA.
Thank you, Guy, for teaching us this method, which has improved our decision-making process and continues to drive better outcomes.
The “Traffic Light” Approach to Problem Solving
By Guy Rosen
Any time you want to proceed with a new product idea, figure out a strategy or decide on a feature, you’ll have a lot of questions to answer: Is it worth it? How will it affect people? Should we build it one way, or another way? Do we have the resources, or the time? Should we proceed at all? How well are the choices we made progressing? Should we shut it down?
These questions need to be resolved. But they don’t exist in isolation: they inform and pull against each other. It can be hard to pin down the right questions to ask, to sort through many valuable opinions, and even harder to know what steps to take, or not take, when the answers and outcomes are ambiguous.
I’ve always found lists of “pros and cons” inefficient. There had to be a better way to frame available options and make a decision with other leaders on my team.
Enter the traffic light! It works like this: every decision or potential decision is color-coded on a matrix as red, yellow, or green. This allows you to see a range of possible futures all at once, and make the best call you can, given what you know. It’s a rubric that has been helpful to me in situations spanning personal dilemmas to product decisions to staffing decisions. While the examples here are product-centric, this approach can be applied to any decision, big or small.
There are three steps to building out the matrix.
- Step One: identify the criteria that you care about.
- Step Two: figure out your options based on that criteria; and
- Step Three: build the matrix, and color-code it, so you can make a good decision. Red — negative for the criteria; Yellow — neutral; and Green — positive for the criteria.
So let’s see this in action:
Step One: Identify the criteria that you care about.
Let’s say you have an idea. Some people will think it’s a great idea, others will think it’s a waste of space. The first step is to lay out all the relevant criteria by which you will judge the idea. Do this by framing the criteria as questions, not statements. They should be inclusive and comprehensive about what the teams care about. And you should number them, so they’re easier to refer to.
So, for example:
Step Two: Figure out your options based on that criteria;
The next step is to address the criteria you’ve identified:
And do the same for all the remaining, various other paths you might decide to take.
You might have more than three variable options. But the matrix loses effectiveness if you have to go to Options D, E, F, G. Pick your top three. Four is pushing it. Five is probably too many. Six is definitely too many.
Step Three: Build the matrix
Using three colors: red, yellow and green, you fill in the matrix so all your options are clearer. Feel free to also consider other color palettes that are more accessible to people with colorblindness.
This will give you a decent overview of the various options in front of you, and the paths you might decide to take. Usually, that’s where the most green is, but not always. The point of this system is to guide you to making the right decision for your organization. You still need to use your best, independent judgment to decide what you’re going to do.
What Comes Next
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Once the matrix is built, you should summarize the options and provide a recommendation. This is the most important visual that you’ll share with the group and where most of the conversation will focus. Without even knowing the options you can clearly see which have more “green” and which have more “red” and which criteria tend to trade off against each other.
With the recommendation given, the final thing to do is make a decision. If you’ve done all the previous work, this should be the easy part. Check the criteria and make your call. Document your work, press forward, and make things happen.
In the end, decision making is a process, not a one-time thing. Any complex organization staffed by insightful, smart people will have a lot to offer. But just as important as the right input is having in place the right decision making structure that will not only take into account competing ideas, it will filter out the bad ones, filter up the good ones, and produce quality work everytime.
Helpful Tips
Here’s some helpful advice on how to make this system work for you:
- Always number the criteria; this way people can say, without ambiguity: “let’s talk about about Issue #2”
- Always label the options: A, B, C, and so on. This is so they’re easier to refer to, and won’t get confused with the enumerated criteria (1, 2, 3, etc.)
- Be explicit about what the “better” answer is. A higher value may be good for reach, but it’s bad for complexity. Be specific about judging the criteria with reference to your goals.
- Be inclusive. Even if you don’t accept a team’s conclusions, it matters that their criteria was considered. Don’t dismiss criteria out of hand. Put it in the matrix.
- One way to test if you’ve got the right criteria is to ask: “If we had an option that satisfied these criteria, do we all agree we’d move forward?” If the answer is still no, continue the conversation. You have more criteria to consider.
- Among your various options: be sure to give people all the information needed to be informed about a particular pathway. You might need to build a mock, or give a presentation. People should feel informed.
If you have thoughts about this system, or your own decision making system, I’d love to read about it in the comments.
Traffic Signal Requests - NYSDOT - NY.Gov
Your Safety Is Our Business . . .
Like you, the New York State Department of Transportation (NYSDOT) is concerned about motorist and pedestrian safety. Because each and every intersection and roadway on Long Island has its own unique characteristics in terms of circumstances and needs, each and every request NYSDOT receives to install a traffic signal is given thorough and careful consideration. Safety is NYSDOT’s top priority, and the ultimate decision to install a traffic signal is based foremost on its ability to enhance public safety. The DOT Long Island region receives more than 1,000 requests each year for traffic controls, including signals. It is important to understand that the necessary data collection and engineering analysis for each requested location takes time. The following guide is provided to help you understand the often time-consuming process for determining whether the installation of a traffic signal is the appropriate safety improvement.What Happens When A Traffic Signal Request Is Submitted . . .
NYSDOT uses a set of measurable criteria to evaluate each request received in accordance with current engineering standards and principles. Your request for a traffic signal sets in motion a substantial chain of tasks: the request is assigned a case number; an engineer is assigned to the case; the location is observed and inspected and traffic conditions are documented. Based on all the data and information collected, a determination is made on the most appropriate safety improvement that can be taken.
Specifically, the engineer conducts a thorough on-site review of the intersection, observes traffic movements, collects data on vehicle and pedestrian traffic usage, then analyzes three years of accident history of the intersection. Given the significant number of requests for traffic signals received, there is admittedly, some time lag until the engineer can begin the investigation. Also, the collection of is often a time-consuming process, since time of day, weather conditions, time of year and other factors can affect traffic pattern.
The engineer evaluates the site based on a series of criteria. Generally, the evaluation includes answers to the following questions:
Based on the findings, NYSDOT determines whether or not the installation of a traffic signal would improve safety and mobility and is therefore appropriate for that intersection.
On The Plus Side . . .
When a signal is installed under conditions that justify its use, it is invaluable in improving the safety and efficiency of both pedestrian and vehicular traffic. A traffic signal can also improve the flow of traffic.
On The Minus Side . . .
If a traffic signal is placed at an intersection that does not necessarily need one, it can cause an increase in rear-end collisions, excessive delay, disobedience of signals or the diversion of traffic to local residential streets. These factors are carefully weighed to assure that a traffic signal would not create more problems than it would solve at a particular location.
Once A Traffic Signal Is Approved . . .
Once a signal is approved, most people assume that it will be installed immediately. Unfortunately, it is not that simple. The process of installing a signal is done in two phases. The design phase requires an additional field survey of the intersection, locating utilities (above ground and underground) and actual design of a traffic signal system that is appropriate for that particular intersection. Some features of the signal design include determining the appropriate pole size, placement of the signal head(s), pedestrian facilities, required pavement markings, signal phasing for all traffic movements at the intersection, and determining the correct timing for each phase.
The next step is actual construction of the signal. This includes providing the design plans to the contractor, ordering materials including signal poles, signal heads, pull boxes, etc. and then the actual construction. NYSDOT strives to install each new traffic signal within six months from the date the signal is approved.
If A Traffic Signal Is Not Approved . . .
If NYSDOT determines that the installation of a traffic signal is not appropriate for an intersection, there are nevertheless other possible steps that may be taken to address to improve safety and mobility based on the analysis of the intersection. They include:
What Happens Next?
Once you provide a written request, the steps above begin, and the process of evaluating your request has begun. Given the time-consuming process, NYSDOT requests your patience, but please be assured that your request is receiving our very careful and thorough consideration. As soon as NYSDOT has collected sufficient data to make a final determination, you will be contacted. In the interim, if you have any questions, our number and address is provided below for your convenience.
For More Information:
Please contact the Traffic Engineering & Safety Office of NYSDOT at (631) 952-.
Or Write us at:
New York State Department of Transportation
Regional Traffic Engineer
250 Veterans Memorial Highway
Hauppauge, NY
When calling or writing, please have your assigned Case Number on hand (if applicable).
If you are looking for more details, kindly visit types of traffic lights.
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