绿灯
遇上交通灯为绿灯时，必须马上进入交叉路口从而不影响交通。但是在同一时间，必须确定在交叉路口内并没有其他道路使用者阻塞我们前方的道路。例如：正前方现在塞车，或是还有行人在过马路。否则，就算绿灯亮着，仍不可向前驶。
左转岔道slip lane以涂漆的安全岛或交通岛标出。在设有左转岔道处必须使用左转岔道转弯。
Reference: http://mylicence.sa.gov.au/road-rules/the-drivers-handbook/traffic-lights
红灯
遇上交通灯为红灯时，必须停在白线后。同时，车头不可以过白线也不可以停在白线后超过一米。如果交通灯没有白线，但有Stop here牌(图一)，必须停在牌正后方。如果没有白线或Stop here牌，则停在交通灯正后方。(这和没有白线的Stop Sign不一样)
如果没有左方向的绿箭咀Green Arrow或是左转岔道slip lane, 交通灯为红灯时绝对不能转左。
Reference: Australian Road Rule 56
Reference: http://mylicence.sa.gov.au/road-rules/the-drivers-handbook/traffic-lights
黄灯
遇上交通灯为黄灯时，在安全及容许的情况下必须停在白线后。同时，车头不可以过白线也不可以停在白线后超过一米。详情请见上面红灯。
如果不能够安全的情况下停在白线后，就可以冲黄灯。例如: 车速太快，后车跟车太近，或对面右转车辆已经开始转弯。
Reference: Australian Road Rules 57
Reference: http://mylicence.sa.gov.au/road-rules/the-drivers-handbook/traffic-lights
Australian Road Rules 56. Stopping for a red traffic light or arrow
(1) A driver approaching or at traffic lights showing a red traffic light must stop—
(a) if there is a stop line at or near the traffic lights—as near as practicable to, but before reaching, the stop line; or
(b) if there is a stop here on red signal sign at or near the traffic lights, but no stop line—as near as practicable to, but before reaching, the sign; or
(c) if there is no stop line or stop here on red signal sign at or near the traffic lights—as near as practicable to, but before reaching, the nearest or only traffic lights,
and must not proceed past the stop line, stop here on red signal sign or nearest or only traffic lights (as the case may be) until the traffic lights show a green or flashing yellow traffic light or no traffic light.
Offence provision.
Australian Road Rules 57—Stopping for a yellow traffic light or arrow
(1) A driver approaching or at traffic lights showing a yellow traffic light must stop—
(a) if there is a stop line at or near the traffic lights and the driver can stop safely before reaching the stop line—as near as practicable to, but before reaching, the stop line; or
(b) if there is no stop line at or near the traffic lights and the driver can stop safely before reaching the traffic lights—as near as practicable to, but before reaching, the nearest or only traffic lights; or
(c) if the traffic lights are at an intersection and the driver cannot stop safely in accordance with paragraph (a) or (b), but can stop safely before entering the intersection—before entering the intersection,
and must not proceed past the stop line or nearest or only traffic lights, or into the intersection (as the case may be), until the traffic lights show a green or flashing yellow traffic light or no traffic light.
(2) A driver approaching or at traffic arrows showing a yellow traffic arrow who is turning in the direction indicated by the arrow must stop—
(a) if there is a stop line at or near the traffic arrows and the driver can stop safely before reaching the stop line—as near as practicable to, but before reaching, the stop line; or
(b) if there is no stop line at or near the traffic arrows and the driver can stop safely before reaching the traffic arrows—as near as practicable to, but before reaching, the nearest or only traffic arrows; or
(c) if the traffic arrows are at an intersection and the driver cannot stop safely in accordance with paragraph (a) or (b), but can stop safely before entering the intersection—before entering the intersection,
and must not proceed past the stop line or nearest or only traffic arrows, or into the intersection (as the case may be), until the traffic arrows show a green or flashing yellow traffic arrow or no traffic arrow.
Offence provision.
Note—
(3) If the traffic lights or traffic arrows (as the case may be) are at an intersection and the driver is not able to stop safely under subrule (1) or (2) (as the case may be) and enters the intersection, the driver must leave the intersection as soon as the driver can do so safely.
Offence provision.
