Chapter 5B. Regulatory Signs
Section 5B.01 Introduction
Support:
The purpose of a regulatory sign is to inform highway users of traffic
laws or regulations, and to indicate the applicability of legal
requirements that would not otherwise be apparent.
The criteria for regulatory signs are contained in Chapter 2B and in other Sections of this Manual. Criteria for regulatory signs that are specific to low-volume roads are contained in this Chapter.
Section 5B.02 STOP and YIELD Signs (R1-1 and R1-2)
Guidance: STOP (R1-1) and YIELD (R1-2) signs (see Figure 5B-1) should be considered for use on low-volume roads where engineering judgment or study, consistent with the provisions of Sections 2B.04 to 2B.10, indicates that either of the following conditions applies:
- An intersection of a less-important road with a main road where application of the normal right-of-way rule might not be readily apparent.
- An intersection that has restricted sight distance for the prevailing vehicle speeds.
Figure 5B-1 Regulatory Signs on Low-Volume Roads
Section 5B.03 Speed Limit Signs (R2 Series)
Standard:
If used, Speed Limit (R2 series) signs (see Figure 5B-1) shall display
the speed limit established by law, ordinance, regulation, or as
adopted by the authorized agency following an engineering study.
The speed limits shown shall be in multiples of 10 km/h or 5 mph.
Speed limits shall be established in accordance with Section 2B.13.
Option:
Speed limit signs may be used on low-volume roads that carry traffic
from, onto, or adjacent to higher-volume roads that have posted
speed limits.
Section 5B.04 Traffic Movement and Prohibition Signs (R3, R4, R5, R6, R9, R10, R11, R12, R13, and R14 Series)
Support:
The regulatory signs (see Figure 5B-1) in these series inform road
users of required, permitted, or prohibited traffic movements involving
turn, alignment, exclusion, and pedestrians.
Standard:
If used, signs for traffic prohibitions or restrictions shall be
placed in advance of the prohibition or restriction so that traffic
can use an alternate route or turn around.
Guidance:
Signs should be used on low-volume roads to indicate traffic prohibitions
and restrictions such as road closures and weight restrictions.
Option:
These signs may be useful on a low-volume road near and at the intersections
or the connections with a higher class of road, and where the regulatory
message is essential for reasonably safe transition from the low-volume
road to the higher-class facility and vice versa.
Section 5B.05 Parking Signs (R8 Series)
Option:
Parking signs (see Figure 5B-2) may be installed selectively on
low-volume roads with due consideration of enforcement.
Figure 5B-2 Parking Signs on Low-Volume Roads
Section 5B.06 Other Regulatory Signs
Standard:
Other regulatory signs used on low-volume roads that are not discussed
in Part 5 shall conform with the criteria contained in other Parts
of this Manual.
