Drivers often crash into oncoming motorcyclists after making what has been termed the "looked but failed to see" error. This is a major cause of fatalities on the roads worldwide. Recent research in an advanced driving simulator has suggested that some of these crashes may actually be caused by a failure of short-term memory rather than a failure of visual search. To explore this finding further the current study uses a simulated junction-crossing task where drivers have to repeatedly decide whether a junction is safe to cross while making head movements to the left, ahead, and to the right. Like everyday driving, this task requires the driver to make their crossing decisions based on a combination of the information they are looking at and their memory for information from their last two head movements. This task is surprisingly hard to do and drivers make potentially dangerous crossing errors (deciding the junction is safe to cross even though they have recently viewed an oncoming vehicle). Subsequent memory tests demonstrate that their memory for both the presence and details of recently inspected vehicles is remarkably poor. One possible way to prevent these crossing errors may thus be to improve drivers' short-term memory capacity for relevant visual information. The current paper explores an intervention where 60 drivers performing the crossing task say the word "bike" out loud every time they see an oncoming motorcycle. This simple intervention does indeed improve drivers' memory for oncoming vehicles compared to 60 drivers in a control condition. This is presumably because relevant information is still available in the phonological loop component of working memory even when the visuospatial system is overloaded. This may provide an easy way to reduce the very high rate of motorcycle casualties internationally.