Like checking whether there was enough time to catch a bus after leaving work, this method compares speed, distance, and elapsed time to determine whether an event could have happened the way someone says it did. In crash investigation, time-distance analysis uses measured distances, estimated or recorded speeds, perception-reaction time, braking time, and vehicle movement to reconstruct when each driver reached a point on the road. It is a standard tool in accident reconstruction for testing visibility, stopping opportunity, lane changes, intersection entry, and claims about who had the last clear chance to avoid impact.

In practice, the analysis may answer questions such as whether a driver on I-95 could have stopped before striking traffic ahead, or whether a pedestrian was visible long enough for evasive action. Reconstruction experts often combine roadway measurements, event data recorder information, surveillance video, and scene evidence with formulas converting miles per hour to feet per second. Small changes matter: a difference of 0.5 seconds in perception-reaction time can add dozens of feet to stopping distance.

For an injury claim, time-distance analysis can support or undermine allegations of negligence, speeding, distraction, or failure to yield. In Maryland, where contributory negligence can completely bar recovery if the injured person is found even 1% at fault, a precise timeline can be decisive. Maryland State Police investigators may document the underlying measurements, but expert interpretation is often needed to connect those facts to liability and causation.