You rarely prove it at the scene. Direct evidence of distracted driving almost never presents itself in the moment — but it is often obtainable through the litigation process, and in cases where the crash mechanics suggest inattention, it is worth pursuing systematically.
Cellphone Records and Digital Evidence
In litigation, subpoenas to the driver's carrier can produce call, text, and data logs timestamped against the crash. Records showing active phone use within seconds of impact are powerful on both liability and damages — few facts move an adjuster or a jury like a text sent at the moment of collision.
Timing matters here too. Carriers operate on retention schedules, and requests for records should happen early in the case, not as an afterthought in year two.
Time-Sensitive Traffic and Business Camera Video
Dashcams, surveillance systems at nearby businesses, traffic cameras, and other vehicles increasingly capture the seconds before a crash. Seattle's dense commercial corridors — downtown, Capitol Hill, Ballard — mean there is often camera coverage that is not obvious from the scene itself.
The catch is the same as always: footage gets overwritten, sometimes within days. Time-sensitive preservation requests to nearby businesses are among the highest-value early moves in a distracted driving case.
Witness Accounts of Distracted Driving
Witnesses may have seen the driver looking down, holding a phone, drifting, or failing to react before impact, making prompt witness identification important.
Crash Reconstruction and Physical Evidence
Reconstruction can identify driving behavior consistent with inattention: no pre-impact braking, no evasive action, a straight-line impact trajectory in a situation where an attentive driver had time and room to see and avoid the cyclist. The absence of any reaction is itself evidence of where the driver's eyes were.
Driver Statements and Admissions
Statements made at the scene — particularly to police, before legal counsel is involved — sometimes contain admissions: looking down, not seeing the cyclist, being distracted. The police report is worth reading closely for exactly this. Washington also prohibits handheld device use while driving under RCW 46.61.672, which gives a statutory hook when the evidence shows it.
Evidence That Does Not Reliably Prove Phone Use
You cannot productively demand phone records on your own without a lawsuit, and the at-fault insurer will not obtain them for you. This is litigation work, which is a significant part of why involving counsel early matters in serious cases where distraction is suspected. The evidence exists — but only for a while, and only for those with the tools to get it.
Legal sources
General legal information only. Specific facts, policy language, parties, and deadlines can change the analysis.

