TY  - JOUR
PY  - 2017//
TI  - Effects of alert cue specificity on situation awareness in transfer of control in Level 3 automation
JO  - Transportation research record
A1  - Wright, Timothy J.
A1  - Agrawal, Ravi
A1  - Samuel, Siby
A1  - Wang, Yuhua
A1  - Zilberstein, Shlomo
A1  - Fisher, Donald L.
SP  - 27
EP  - 33
VL  - 2663
IS  - 
N2  - Drivers in a Level 3 automation environment typically need at least 8 s following a manual takeover request to achieve appropriate levels of situation awareness. Studies that have derived this time estimate use general audio alerts that suggest a transfer of control from the automation to the driver might be required. The current experiment examined if improvements in younger drivers' situation awareness might be observed in as little as 4 s before a latent hazard might materialize and a transfer of control occurs if more specific audio alerts are used. Younger drivers either drove manually with no cue or in one of four automation conditions: (a) a general cue condition, (b) a condition that described the risky features of the roadway and the location of those features, (c) a condition that contained information about the actual identity of the threat and the required behavior, and (d) a combination cue condition (both environment and threat cue). Eye movements were recorded as drivers completed six scenarios in a simulated automated driving experiment. The results showed that audio cues that contained information about risky roadway features increased the detection of latent hazards by almost 40% compared with when a general cue or a threat cue was used. Performance with the combined cue was no better than performance with the environment cue. The environment cue gives drivers the critical seconds needed to mitigate a potential crash. <br><br>RESULTS are informative about which types of alerts to use to inform drivers of upcoming hazards.<p />  <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/10.3141/2663-04
ID  - ref1
ER  -