No Straight Through Sign

Introduction

Certain intersections or road designs prohibit vehicles from continuing straight through. The No Straight Through Sign is a key regulatory sign in Canada that clearly informs drivers they are not allowed to proceed forward at a particular junction. It plays an important role in traffic control and is essential knowledge for the Ontario G1 driving test.

What Does the No Straight Through Sign Mean?

This sign features a black upward arrow, representing forward travel, crossed out by a red prohibition circle with a slash, and placed on a white square background with a black border. The symbol means that drivers must not drive straight ahead past this point. Instead, they may be required to turn left or right depending on road markings or additional signs.

Where Are No Straight Through Signs Typically Placed?

You’ll commonly find this sign in areas where straight-through movement could cause congestion, conflict, or safety hazards, such as:

• At T-intersections, where continuing forward leads into private property or a dead-end

• At controlled intersections, directing vehicles into a turning-only configuration

• In construction or detour zones

• Near highways or off-ramps, where forward travel would disrupt merging traffic

• In residential areas to reduce through-traffic

Placement is guided by standards in the Ontario Traffic Manual (OTM).

How Should Drivers Respond to the No Straight Through Sign?

When encountering this sign:

• Do not continue driving straight ahead

• Check for additional signs or lane arrows directing left or right turns

• Yield or stop as necessary, especially at intersections

• If you’re unsure of allowed directions, follow road markings or traffic signals

• Ignoring this sign may result in: Traffic tickets, unsafe intersections, or confusion leading to collisions

Visual Representation of the Sign

The sign displays a black vertical arrow (straight ahead) crossed by a red circle and slash, all framed in a white square with a black outline, clearly signaling a prohibition on forward travel.

Conclusion

The No Straight Through Sign ensures safe traffic flow and helps regulate complex intersections or restricted zones. Understanding this sign is crucial for everyday navigation and is a must-know item for anyone preparing for the Ontario G1 test. Always watch for these regulatory signs and adjust your route accordingly to stay safe and compliant on Canadian roads.