NO STRAIGHT THROUGH Sign
Rb-10 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO STRAIGHT THROUGH Sign (Specified Times)
5
8 6
Rb-10A 60 cm x 90 cm Font Highway Gothic C
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
NO RIGHT TURN Sign
Rb-11 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO RIGHT TURN Sign (Specified Times)
6
5 8
Rb-11A 60 cm x 90 cm Font Highway Gothic C
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO LEFT TURN Sign
Rb-12 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO LEFT TURN Sign (Specified Times)
5
8 6
Rb-12A 60 cm x 90 cm Font Highway Gothic C
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
NO STRAIGHT THROUGH OR RIGHT TURN Sign
Rb-13 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO STRAIGHT THROUGH OR LEFT TURN Sign
Rb-14 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO TURNS Sign
Rb-15 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
Background – White Reflective
NO U-TURNS Sign
Rb-16 60 cm x 60 cm
Font N/A
Colour Interdictory Symbol – Red Reflective Legend & Border – Black
BUSES EXCEPTED Tab Sign
8
Rb-10t 30 cm x 60 cm Font Highway Gothic D
Colour Legend & Border – White Reflective Background – Black
Purpose and Background
The purpose of turn control signs is to indicate the prohibition of specific turns or manoeuvres that are indicated symbolically on the signs using arrows and the red interdictory symbol. Examples of prohibited turns or manoeuvres include right turns, left turns, U-turns and straight-through movements. There are a number of turn control signs to represent various combinations of prohibited turns which may or may not be restricted by time of day.
Sign Types
The NO STRAIGHT THROUGH sign (Rb-10) prohibits straight-through movements, and requires that the vehicle turn to either the left or right.
The NO STRAIGHT THROUGH sign with
specified times (Rb-10A) restricts the Rb-10
prohibition to the specified times of day and days of week.
The NO RIGHT TURN sign (Rb-11) sign prohibits right turns.
The NO RIGHT TURN sign with specified times
(Rb-11A) restricts the Rb-11 prohibition to the
specified times of day and days of week.
The NO LEFT TURN sign (Rb-12) sign prohibits left turns.
The NO LEFT TURN sign with specified times
(Rb-12A) restricts the Rb-11 prohibition to the
specified times of day and days of week.
The NO STRAIGHT THROUGH OR RIGHT TURN
sign (Rb-13) prohibits both straight-through and
right-turn movements.
The NO STRAIGHT THROUGH OR LEFT TURN
sign (Rb-14) prohibits both straight-through and
left-turn movements.
The NO TURNS sign (Rb-15) prohibits both right- turn and left-turn movements.
The NO U-TURN sign (Rb-16) prohibits a 180 degree turning manoeuvre at or near the location of the sign.
All signs in the above list having time-of-day restrictions, as indicated by the “A” sign number suffix (e.g., Rb-10A, Rb-11A and so on), may be replaced by an electrically or mechanically operated blank-out sign bearing the legend of the
corresponding sign number minus the “A” suffix (e.g., Rb-10, Rb-11 and so on). The legend of the blank-out sign must be visible only during the times that the restriction is in effect. For more information on blank-out signs, see Section 1.7 (Dynamic Technologies) and Book 10 (Changeable Message Signs).
The BUSES EXCEPTED tab sign (Rb-10t) may be used where the Road Authority wishes to permit buses to make the movements prohibited by any of the above turn control signs.
Guidelines for Use
Turn control signs are typically used at intersections. In the case of U-turns, however, the sign indicates that drivers are prohibited from making U-turns at or near the location of the sign.
Additional turn control signs may be used as advance signs upstream of the intersection to which they apply. There should be no other intersections, driveways or entrances between the advance sign and the intersection to which the turn control sign applies.
If entry to a restricted area is prohibited during certain time periods only, the appropriate turn control signs having an “A” suffix indicating time restrictions should be used e.g., Rb-10A, Rb-11A and Rb-12A. This application avoids the need for a DO NOT ENTER sign with time restrictions, which the OTM advises against (see Guidelines for Use for DO NOT ENTER sign (Rb-19)).
At an intersection with a one-way street, the ONE- WAY sign (Rb-21) should be used rather than a turn control sign to indicate that entry to the one-way street is prohibited. At a signalized intersection with a one-way street, however, a turn control sign may be added to the ONE-WAY sign, providing the benefit of supplementary and redundant information to the driver.
In order to allow drivers more opportunity to read and carry out any necessary lane changes where times and days are shown on turn control restriction signs, a larger sign size should be used where possible. The maximum sign size may be limited by sign support structure and wind loading
considerations. See Book 3 (Sign Support and Installation) for further information on structural details.
The BUSES EXCEPTED tab sign (Rb-10t) must be installed directly below the turn control sign to which the exception applies. If there are two or more turn control signs at the same location applying to the same prohibited movement, each sign must have a Rb-10t tab sign attached directly below it.
Information on permissive signs is available in the Highway Traffic Act, but the use of these types of signs is not recommended for turn control.
Location Criteria
Turn control signs must be placed in accordance with Figure 5.
At unsignalized intersections, turn control signs must be mounted facing traffic approaching the
intersection.
At signalized intersections, turn control signs must be mounted adjacent to the signal heads governing the traffic to which they apply. A turn control sign, that is mounted on a traffic signal mast arm and installed directly over any roadway, must have a minimum clearance of 4.5 m above the roadway. Supplementary signs may be placed on the right side of the road immediately upstream of the intersection.
Legal Status
Highway Traffic Act, Section 143 (R.S.O. 1990) prohibits U-turns in specific situations. In these cases, it is not necessary to use the NO U-TURN sign (Rb-16), but advisable to do so.
Highway Traffic Act, Regulation 615, Sections 21 to 23 (R.R.O. 1990).
Minimum Sheeting Requirement
All signs except BUSES EXCEPTED tab sign (Rb-10t) must be Type III or IV as of January 1, 2002.
Type I is minimum requirement for these signs prior to the date indicated.
Type I is the minimum requirement for the BUSES EXCEPTED tab sign (Rb-10t).
Special Considerations
Rb-11A
Rb-11A
NO RIGHT TURN
Rb-12A (Optional Addition)
Rb-12A