1. No category

APPENDIX 3
“STOP” SIGN AND JUNCTION VISIBILITY CRITERIA
Visibility measurements at a junction
“STOP” Sign Criteria
X value:
3.0m - side road lightly trafficked
4.5m - side road has some through traffic value
Y value:
For 50mph
For 60mph
70m
90m
70m
90m
Notes:
1. speeds are 85th percentile value of private cars on main road;
2. “X” values measured on side road centreline;
3. “Y” distances measured along nearside channel; and
4. a “STOP” sign may be justified where available visibility is less than the Y value
indicated for the speed and relevant X value.
Junction visibility requirements (minimums)
X value:
2.4m (Normal driver position)
4.5m (Busier side roads)
9.0m (Maximum for trunk roads)
Y value:
For 50mph
For 60mph
160m
215m
160m
215m
160m
215m