What are Traffic Incidents in Maryland? A Comprehensive Guide to Roadway Safety and Management

In Maryland, traffic incidents are defined as any non-recurring events that cause a reduction in roadway capacity or an abnormal increase in traffic demand. These incidents include vehicle collisions, stalled or disabled vehicles, spilled cargo, debris on the road, and emergency maintenance activities. Managed primarily through the Coordinated Highways Action Response Team (CHART), these events are prioritized based on their potential to cause secondary accidents and their impact on commuter delay.

Traffic incidents represent one of the most significant challenges to the Maryland Department of Transportation (MDOT) and the Maryland State Police (MSP). Unlike recurring congestion—the predictable heavy traffic seen during "rush hour"—traffic incidents are unpredictable and require a sophisticated network of sensors, patrols, and communication systems to manage. In 2026, as Maryland’s population centers in Baltimore, Silver Spring, and Annapolis continue to densify, understanding the nature of these incidents is crucial for every driver.

Defining the Scope of Traffic Incidents in Maryland

The term "traffic incident" is often used interchangeably with "accident" or "crash" by the general public, but for Maryland’s transportation authorities, the scope is much broader. An incident is any event that disrupts the "steady-state" of the highway system. Understanding these categories helps drivers anticipate the duration of delays and the type of emergency personnel they may encounter.

Vehicle Collisions and Crashes

Collisions are the most high-profile type of traffic incident. These range from minor "fender benders" to multi-vehicle pileups. In Maryland, these are further classified by severity: Property Damage Only (PDO), Personal Injury, or Fatal. The presence of a collision often necessitates the arrival of both the Maryland State Police for documentation and emergency medical services (EMS) if injuries are reported.

Disabled Vehicles and Mechanical Failures

A significant portion of Maryland’s daily incident logs consists of disabled vehicles. These are cars that have run out of fuel, suffered a flat tire, or experienced mechanical failure. While they may seem minor, a vehicle stopped on the narrow shoulders of I-95 or I-495 (the Capital Beltway) creates a "bottleneck" effect as drivers slow down to move over, often leading to secondary rear-end collisions.

Roadway Hazards and Debris

Maryland’s position as a major logistics hub means a high volume of freight traffic. Blown tires (road gators), unsecured cargo, and fallen trees after a Chesapeake storm are all classified as traffic incidents. These require rapid removal to prevent drivers from swerving into adjacent lanes, which is a leading cause of high-speed side-swipe accidents on Maryland interstates.

The Role of CHART: Maryland’s Incident Management Powerhouse

The Coordinated Highways Action Response Team (CHART) is Maryland’s specialized interagency program dedicated to improving "highway operations." Established as a joint effort between the MDOT State Highway Administration (SHA), the Maryland State Police, and other local agencies, CHART is the primary entity responsible for identifying and clearing traffic incidents.

Monitoring and Detection

As of 2026, CHART utilizes a vast network of Intelligent Transportation Systems (ITS). This includes hundreds of closed-circuit television (CCTV) cameras, pavement sensors, and weather stations strategically placed along major corridors like I-70, I-83, and the US-50 corridor. These tools allow operators at the Statewide Operations Center (SOC) in Hanover to detect an incident often before it is even reported via 911.

Incident Response Units (IRUs)

You have likely seen the yellow-and-black CHART patrol trucks on Maryland highways. These Incident Response Units are mobile workshops designed to clear the road quickly. Their duties include:

• Providing basic mechanical assistance: Helping drivers with jump-starts or tire changes to get them moving again.
• Debris removal: Clearing tire remnants or small objects from travel lanes.
• Traffic control: Using high-visibility arrow boards to direct traffic away from a crash scene, protecting both the victims and the first responders.
• Relocating vehicles: Using push bumpers to move "fender bender" vehicles from travel lanes to the shoulder to restore traffic flow.

By reducing the duration of a traffic incident by even 10 minutes, CHART prevents miles of backlogged traffic and saves the Maryland economy millions of dollars in lost productivity and fuel consumption.

Maryland Traffic Laws Regarding Incidents

Maryland has specific statutes designed to manage the aftermath of traffic incidents. Ignorance of these laws can lead to significant fines or, more importantly, increased danger for everyone on the road.

The "Move It" Law (Clear the Road)

Under Maryland Code, Transportation § 21-103.1, if you are involved in a traffic incident that results in only property damage and the vehicle is safe to drive, you are legally required to move the vehicle off the travel lanes to the shoulder or a nearby safe location. Many drivers mistakenly believe they must leave their cars in place for the police to see the "crime scene." In reality, failing to move a drivable vehicle after a minor incident in Maryland can result in a citation, as it creates an unnecessary hazard for other motorists.

The "Move Over" Law

Maryland’s Move Over Law (Transportation § 21-405) was significantly expanded over the years to protect all people on the roadside. As of 2026, the law requires drivers approaching a vehicle on the shoulder with hazard lights or warning signals flashing to:

1. Change lanes into an available lane not immediately adjacent to the stopped vehicle, if safe to do so.
2. Slow down to a speed that is safe for the existing weather and road conditions if a lane change is not possible or unsafe.

Initially covering only emergency vehicles like police and fire trucks, the law now includes tow trucks, CHART vehicles, and even everyday motorists stopped with their hazards on. Violating this law is a primary cause of responder fatalities in the Mid-Atlantic region.

Classifying Incident Severity and Response Tiers

Not every traffic incident is handled the same way. Maryland uses a tiered system to determine which resources are deployed and how the public is notified via Dynamic Message Signs (DMS).

The Legal and Insurance Implications of an Incident

When a traffic incident occurs in Maryland, the legal framework is governed by a "contributory negligence" standard. Maryland is one of the few remaining jurisdictions where, if a driver is found to be even 1% at fault for an incident, they may be barred from recovering damages from the other party in a civil suit.

The Importance of the Police Report

For any incident involving injury or significant property damage, a Maryland Motor Vehicle Accident Report (State Form ACR) is vital. This document, filed by the responding Maryland State Police or local officer, serves as the official record for insurance companies. It includes:

• Officer’s narrative of the event.
• Diagrams of vehicle positions.
• Driver and witness statements.
• Weather and road conditions at the time of the incident.

Reporting Requirements

While minor incidents can be handled through a private exchange of information, Maryland law requires you to report an incident to the police if:

• Someone is injured or killed.
• A vehicle cannot be safely moved.
• A driver is intoxicated or flees the scene (Hit and Run).
• Public property is damaged (e.g., a guardrail or sign).

Technology and Tools for Navigating Incidents

In 2026, Maryland drivers have more tools than ever to stay informed about real-time traffic incidents. MDOT encourages the use of the "511" system to check for active incidents before starting a journey.

• Maryland 511: Accessible via phone (dial 511) or the MD511 website, this system provides real-time updates on lane closures, incident severity, and average travel speeds.
• CHART Web Mapping: For those who want a visual representation, the CHART mapping tool shows live camera feeds and the exact location of Incident Response Units.
• Third-Party Integration: Maryland feeds its incident data directly into apps like Waze and Google Maps, ensuring that the "Incident Ahead" alerts you receive are based on official state data.

Common Causes of Traffic Incidents in Maryland

Understanding why incidents happen in the Free State can help drivers mitigate their own risks. Maryland’s geography and infrastructure play a large role in its incident profile.

1. Weather Fluctuations: Maryland’s "winter" often consists of freeze-thaw cycles. This leads to black ice on bridges like the Millard E. Tydings Memorial Bridge or the Chesapeake Bay Bridge, causing high-volume incidents during morning commutes.
2. Tailgating in High-Volume Corridors: On the I-695 (Baltimore Beltway), the high density of vehicles leads to frequent rear-end "chain-reaction" incidents when one driver brakes suddenly.
3. Distracted Driving: Despite strict "hands-free" laws, distracted driving remains the leading cause of intermediate-level incidents in Maryland’s suburban counties (Montgomery, Prince George’s, and Baltimore County).
4. Infrastructure Complexity: Areas like the "Spaghetti Interchange" where I-95, I-695, and I-895 meet require rapid lane changes, often resulting in side-swipe incidents.

Frequently Asked Questions

What should I do if I see a traffic incident but I am not involved?

You should not stop unless you are a witness to a serious crime or a major injury where no help has arrived. If you see debris or a disabled vehicle, dial #77 on your mobile phone. This connects you directly to the closest Maryland State Police barracks, who will then dispatch CHART or an officer to clear the hazard.

Is a traffic incident the same as a "work zone"?

No, although they are related. A work zone is a planned event where roadwork is scheduled. A traffic incident is unplanned. However, many traffic incidents occur within work zones because of narrowed lanes and changing traffic patterns.

Who pays for the cleanup of a traffic incident in Maryland?

For minor incidents, the state (through MDOT SHA) absorbs the cost of CHART patrols as a public service. However, for major incidents involving hazardous material spills (like diesel fuel from a truck) or damage to state property (like guardrails), the responsible party’s insurance is typically billed for the restoration costs.

Can I get a "CHART" truck to tow me to a repair shop?

No. CHART Incident Response Units are designed to move you to a safe location (usually the nearest shoulder or an off-ramp). They are not a substitute for a private towing service. Once you are in a safe location, they will help you call a private tow truck if you do not have one.

How does Maryland handle incidents on the Bay Bridge?

The William Preston Lane Jr. Memorial Bridge (Chesapeake Bay Bridge) has a dedicated incident management protocol. Because there are no shoulders on much of the bridge, even a minor stall results in an immediate lane closure. MDOT maintains specialized "tow tugs" on both sides of the bridge to clear vehicles in minutes.

Practical Recommendations for Maryland Drivers

Navigating the high-volume roadways of Maryland requires a proactive approach to traffic incidents. To ensure your safety and the safety of Maryland’s first responders, follow these expert guidelines:

• Prepare an Emergency Kit: Given that a "Major" incident can strand you on I-95 for hours, always keep water, a blanket, and a portable phone charger in your vehicle.
• Use the #77 Shortcut: Program #77 into your phone. It is the fastest way to report a roadway hazard in Maryland without tying up the 911 emergency lines meant for life-threatening situations.
• Check the Cameras: Before crossing major bottlenecks like the Fort McHenry Tunnel or the American Legion Bridge, check the live CHART cameras. If you see a cluster of flashing lights, seek an alternate route immediately.
• Respect the "Move Over" Law: When you see the yellow lights of a CHART truck or the blue lights of the MSP, move over. It is not just a courtesy; it is a legal requirement designed to prevent the "secondary incidents" that claim lives every year in Maryland.

By understanding the mechanics of traffic incidents—from the response tiers of CHART to the legal requirements of the "Move It" law—Maryland residents can contribute to a more efficient and safer transportation network.