Police determine whether speeding caused a crash by examining evidence such as vehicle damage, skid marks, traffic-camera footage, witness statements, road conditions, and the drivers’ actions before the collision. Speeding is not always obvious after a crash, so investigators may need to piece together several sources of evidence before deciding whether excessive speed contributed to the accident.
A crash investigation is about more than determining how fast a vehicle was traveling. Officers also consider whether the speed was unsafe for the road, weather, traffic, or other conditions. If another driver’s speeding contributed to your injuries, understanding the investigation can help you know what evidence may support your ability to seek compensation for your injuries.
Police Examine Skid Marks and Tire Evidence
Skid marks can provide important information about what happened before impact.
When a driver brakes suddenly, the tires may leave marks on the roadway. Investigators can examine their length, location, and direction to help estimate the vehicle’s speed before braking.
Modern vehicles may not always leave traditional skid marks, particularly when anti-lock braking systems are involved. For that reason, officers usually consider tire evidence together with other information rather than relying on skid marks alone.
Vehicle Damage Can Reveal the Force of a Crash
The damage to the vehicles can also help investigators understand how the collision occurred.
The location and severity of damage may provide clues about the direction of impact, point of collision, and relative movement of the vehicles.
In serious crashes, accident reconstruction specialists may use vehicle damage, measurements, and other evidence to develop a more detailed analysis of the collision.
Police Review Traffic-Camera or Dashcam Footage
Video can be some of the strongest evidence in a speeding investigation.
Traffic cameras, nearby business surveillance systems, dashcams, and even footage recorded by witnesses may show what happened immediately before the crash.
Video can help investigators determine:
- How fast vehicles appeared to be traveling
- Whether a driver accelerated before impact
- Whether a driver ran a traffic signal
- Where the vehicles were positioned
- How the collision occurred
If video is available, preserving it quickly can be important because some surveillance systems automatically overwrite older recordings.
Witness Statements Can Help Establish Speed
People who saw the accident may provide information about how the vehicles were moving.
A witness might report that a vehicle was traveling unusually fast, weaving through traffic, or accelerating shortly before the collision.
Witness statements can be useful, but police may compare them with physical evidence and other accounts before reaching a conclusion.
Police Consider Road and Weather Conditions
A vehicle does not necessarily have to exceed the posted speed limit to be traveling too fast for the circumstances.
For example, driving at the posted limit may still be unsafe during heavy rain, fog, icy conditions, construction, or congested traffic.
Investigators may consider the roadway, weather, visibility, traffic volume, lighting, and other conditions when evaluating whether speed was a contributing factor.
Electronic Data May Provide Additional Evidence
Some modern vehicles contain electronic systems that can record information about vehicle operation.
Depending on the vehicle and circumstances, investigators may be able to obtain information concerning speed, braking, acceleration, seat-belt use, or other events surrounding a collision.
This information can become particularly important when the physical evidence does not clearly establish what happened.
Police May Compare Speed With the Point of Impact
Investigators can examine where the vehicles collided and how far they traveled after impact.
The final resting positions of the vehicles, debris patterns, road markings, and damage can help reconstruct the collision.
Accident reconstruction experts may use these measurements to estimate vehicle speeds and determine whether speed contributed to the crash.
Speeding Does Not Always Mean Speed Alone Caused the Crash
Even when a driver was speeding, investigators must consider whether that speeding actually contributed to the collision.
For example, a driver may have been traveling slightly above the posted limit but still have been unable to avoid a crash caused by another driver’s sudden maneuver.
In another situation, excessive speed may have reduced a driver’s reaction time or increased the severity of the impact.
The connection between the speed and the crash matters when determining responsibility.
A Police Citation Can Support a Claim
If police determine that a driver was speeding, the driver may receive a traffic citation.
A citation can provide useful evidence in an insurance or personal injury claim, although it does not automatically determine civil liability.
Other evidence may still be necessary to establish how the speeding contributed to the accident and the resulting injuries.
Key Takeaways
- Police use multiple types of evidence to investigate whether speeding caused a crash.
- Skid marks and vehicle damage can help reconstruct what happened.
- Traffic cameras and dashcams may provide direct evidence of a vehicle’s movement.
- Witness statements can help establish how a driver was behaving before the collision.
- Weather, traffic, visibility, and road conditions can affect whether speed was unsafe.
- Electronic vehicle data may provide additional information in some crashes.
- Speeding must generally be connected to the collision to show that it contributed to the accident.
- A speeding citation can support a claim but does not automatically establish civil liability.
- Preserving evidence after a crash can be important when seeking compensation for injuries.
