Evacuation Route Maps: How to Check Road Closures Before Leaving

By ThePreppersBlueprint.com Editorial Team

The short answer: Before you leave, check three things in order. First, confirm the official evacuation order and any assigned route from your local emergency officials. Second, check your state’s 511 or Department of Transportation (DOT) road-conditions source for closures on both your main route and your backup. Third, make sure official alerts are actually reaching your phone or radio. Pick your backup route before you pull out of the driveway, not after you hit a roadblock. And never drive around a barricade or into a flooded road.

The rest of this guide turns that into a repeatable route-check workflow. It also explains which sources carry authority and where the information gaps are.

Why an Evacuation Route Map Alone Is Not Enough

A map tells you where roads go. It does not tell you which roads are open right now. During an emergency, closures can change quickly, and some routes may be directed or restricted by officials.

Ready.gov notes that many states have designated evacuation zones and predetermined evacuation routes. It also tells people to always follow the instructions of local officials, and it warns that your evacuation route may be on foot, depending on the type of disaster. A map is the starting point. Checking current conditions is what turns it into a plan.

Paper maps still matter. Ready.gov’s basic disaster supplies kit list includes local maps. They work when your phone battery, cell signal, or data connection does not.

Know Which Sources Actually Have Authority

Not all route information is equal. Use sources in this order.

1. Local Emergency Officials: Orders, Zones, and Assigned Routes

Your city or county emergency management office and local law enforcement decide who evacuates, when, and often which routes to use. The CDC’s evacuation guidance is direct: never ignore an order to evacuate, and follow emergency routes. If an official instruction conflicts with your own plan, the official instruction wins.

2. Your State’s 511 and DOT Road-Closure Maps

The Federal Highway Administration describes 511 as an easy-to-remember three-digit telephone number that provides current travel information. FHWA also keeps a state-by-state directory of traffic and road closure information, which gives you a direct way to find your state’s official source.

Details vary by state, so learn your own system before you need it. North Carolina is one example. Its DOT publishes a separate toll-free number for callers outside the state, and it directs travelers to its DriveNC.gov website overnight and during emergencies rather than the operator line. Montana also lists a separate number for callers outside the state. Don’t assume the 511 setup you know from one state works the same way in another.

3. Official Alerts on Your Phone and Radio

Wireless Emergency Alerts (WEA) are short messages from authorized public alerting authorities. They are sent to capable mobile devices in a targeted area. According to FEMA, WEA messages are free, require no subscription, and require no personal information.

There are real limits. The FCC says that to receive a WEA, your device must meet three conditions:

It must be WEA-capable.
It must be switched on.
It must be receiving service from a cell tower of a participating wireless provider.

The FCC also says WEA is only one way to receive emergency information. Wireless companies volunteer to participate in WEA, so confirm with your carrier that your phone is WEA-capable.

The FCC’s WEA-capable devices consumer guide recommends against opting out of alert types such as imminent threat alerts. Check your phone’s notification settings now to make sure they are on. For a second channel, the National Weather Service advises listening to radio and television, including NOAA Weather Radio if possible, during a flood.

Where navigation apps fit: Consumer map and navigation apps can help, but they are not the agencies that close roads. Treat them as a secondary check. When an app disagrees with an official closure, an evacuation instruction, or a barricade in front of you, follow the official source.

The Route-Check Workflow

Use this four-stage workflow. Complete the first stage on a calm day. The other three happen as an emergency develops.

Stage 1: Build It Before Anything Happens

Learn your zone and official routes. Find out whether your state or county uses evacuation zones and predetermined routes, and note yours.
Choose at least two destinations. Ready.gov advises knowing your evacuation destination, such as a friend’s or family member’s home or a designated shelter. Plan one nearby option and one farther away.
Map a primary route and a backup route to each destination. Mark them on a paper map that stays in your vehicle.
Bookmark your official sources. Save your state’s 511 or DOT road-conditions page, your county emergency management page, and the local non-emergency number.
Confirm alerts work. Check your phone’s emergency alert settings, and set up a second channel. Ready.gov’s kit list includes a battery-powered or hand crank radio and a NOAA Weather Radio with tone alert.
Plan for walking. Ready.gov notes that some evacuations may be on foot. Know a walking route to higher ground or a nearby assembly point.

Stage 2: When an Alert or Order Comes In

Read the full message. Note who issued it, which areas it covers, and whether it names routes, shelters, or areas to avoid.
Confirm the order through a second official source. Use your county emergency management website, official social accounts, or local broadcast.
Check fuel. Ready.gov advises keeping a full tank of gas if an evacuation seems likely.
Pull up your state road-closure source. Look at your primary route and your backup route, not just one.

Stage 3: The Final Check Before You Pull Out

Run this go/no-go check at the door:

Is the official order still current? Re-read the latest alert or official post.
Are there closures on my primary route? Check your state DOT or 511 source again right before leaving, because conditions change.
Are there closures on my backup route? A backup you haven’t checked is only a guess.
Do officials want people to use specific routes? If an assigned route differs from your plan, use the assigned route.
Does someone outside the area know my plan? Tell a contact which route you are taking and where you are headed.
Do I have the essentials? The CDC’s list includes phone, chargers, medicines, ID, cash, and a car emergency kit. Add your paper map and a backup battery for your phone, both of which are on Ready.gov’s kit list.

If you can’t answer questions 1 through 4, don’t guess. Contact local officials or follow the most recent official instruction.

Stage 4: On the Road

Let a passenger handle the phone. The driver drives. Rechecking alerts and closures is a passenger’s job, or it waits until you are safely stopped.
Obey every barricade and officer’s direction. A closure in front of you outranks anything on a screen.
Turn around at water on the road. The National Weather Service warns: do not drive into flooded roadways or around a barricade. It notes that water may be deeper than it appears and can hide hazards such as washed-out road surfaces. It also warns that 12 inches of water can float a car or small SUV, and 18 inches can carry away large vehicles.
Recheck at natural decision points. Before major interchanges, bridges, and river crossings, have your passenger confirm the next stretch is still open.

How to Choose a Backup Route

A useful backup route is not just a different road. It should fail differently from your primary route. When you plan it on a calm day, look for these qualities:

It avoids the same choke point. If both routes cross the same bridge or use the same interstate on-ramp, one closure blocks both.
It avoids the same hazard. If your primary route follows a river valley, a backup along the same low ground can flood at the same time.
It leads to a usable destination. A backup road that ends at a shelter or contact you can’t reach doesn’t solve the problem.
It works on paper. You should be able to follow it from your printed map without a signal.
It respects official direction. If officials name designated routes, your backup should be one they permit, not a shortcut through a restricted area.

What to Do When Your Route Is Blocked

Stop somewhere safe before deciding. Don’t reroute while moving in heavy traffic.
Check the latest official alert and your state road-closure source. Confirm whether your backup is still open.
Follow officers and posted detours. At that point, they are the official instruction for the road you are on.
If both routes are blocked, contact local officials. Use the non-emergency number, or call 911 if you are in immediate danger. Ask for current instructions, including whether sheltering in place or moving to a nearby shelter is advised.
Update your outside contact. Tell them your new route and destination.

What Remains Uncertain

Even a well-built plan has gaps you can’t close ahead of time:

Timing. A road can close after you check it.
Uniform 511 service. Phone lines, hours, and websites differ from state to state.
Alert delivery. WEA depends on your device, your settings, carrier participation, and working cell service.
Travel time. Evacuation traffic and detours can make normal-day drive times unreliable.

That uncertainty is why this workflow uses multiple official sources, repeated checks, and a paper backup. Self-reliance here means building redundancy rather than trusting a single screen.

Safety Limits of This Guide

This article is general educational information. It does not replace instructions from your local emergency officials, law enforcement, or transportation agencies, and those instructions always take priority. If you or anyone in your household has a disability, mobility needs, medical equipment, or medications that affect how you can evacuate, plan for that in advance. The CDC’s emergency preparedness and disability inclusion resources are a place to start, and your health care provider can help with medication-specific planning. If you are in immediate danger, call 911.

Your Next Practical Decision

Do this now, while nothing is happening:

Look up your state’s road-closure source through the FHWA directory.
Confirm whether your area uses evacuation zones.
Mark a primary and a backup route to two destinations on a paper map.
Check that emergency alerts are turned on in your phone’s settings.

This is the part of the workflow you can’t do well once an order comes in.