What Usually Causes Motorcycle Accidents?

Left-Turn Collisions

A driver turning left across an intersection, misjudging the motorcycle’s speed or simply not seeing it, is one of the single most common causes of serious motorcycle accidents. This pattern happens so often it has its own name in accident investigation literature.

What makes these collisions especially dangerous is timing: the motorcycle is often already committed to entering the intersection with the right of way when the turning driver pulls directly across its path, leaving little to no time for the rider to react or brake safely.

Unsafe Lane Changes

Motorcycles occupy less visual space than cars, making them easy to miss in a mirror check or blind spot glance. A driver changing lanes without properly checking can force a motorcyclist into a collision or an evasive maneuver that causes a crash.

This is compounded on Arizona’s wider, multi-lane arterial roads and freeways, where drivers frequently change lanes across greater distances, giving a motorcycle more opportunity to occupy a blind spot without the driver realizing it.

Following Too Closely

Motorcycles can sometimes stop faster than cars, and a following driver who is not leaving adequate space risks a rear-end collision that is often far more dangerous for the rider than it would be for another car.

Unlike a car-on-car rear-end collision, a motorcyclist struck from behind has essentially no protective structure absorbing the impact, meaning even a relatively low-speed rear-end collision can throw a rider from the bike.

Road Hazards

Potholes, loose gravel, uneven pavement, and wet or oily road surfaces pose a much greater danger to a two-wheeled vehicle than a car. When a hazard on a public road causes an accident, a claim against the government entity responsible for maintenance may be possible, subject to the 180-day Notice of Claim requirement under A.R.S. § 12-821.01.

Arizona’s climate creates its own hazard patterns worth noting, monsoon season can leave loose debris and sudden standing water on roads that a car handles without issue but that can destabilize a motorcycle in an instant.

Speed and Following Distance Misjudgment

Drivers often misjudge how quickly an approaching motorcycle is closing the distance, since motorcycles present a smaller visual profile than cars, contributing to accidents at intersections and during passing maneuvers.

This misjudgment is a documented perceptual phenomenon, not simply carelessness, smaller objects are subconsciously perceived as farther away and slower-moving than they actually are, which is part of why deliberate, active scanning for motorcycles matters so much for drivers.

Weather and Visibility Factors Specific to Arizona

Intense sun glare, particularly during sunrise and sunset commutes, can make a motorcycle’s headlight and silhouette harder for drivers to pick out against a bright horizon, and dust storms during monsoon season create sudden, severe visibility drops that riders often encounter with little warning.

Evidence That Helps Establish How the Accident Actually Happened

1. Traffic camera or nearby business security footage, if it can be obtained before it is overwritten.
2. Witness statements from anyone who saw the collision happen.
3. The official police report, including any diagrams or fault notations.
4. Photos of the scene, road conditions, and both vehicles.
5. An accident reconstruction expert, in cases where fault is seriously disputed.