Diverted Traffic (Upper Left)

Diverted Traffic (Upper Left) signs are positioned at complex junctions across Ireland where the official detour route requires a bearing left maneuver rather than a sharp left turn.

They're commonly seen at Y-junctions and multi-exit roundabouts in areas like the N25 Cork-Waterford route when diversions need to direct traffic onto dual carriageways or slip roads.

You'll encounter these signs frequently around Dublin's orbital routes when M50 closures require traffic to bear left onto approach roads to smaller motorways like the M4 or M11.

They're particularly important at grade-separated junctions near airports like Dublin or Cork, where multiple road levels and directions require precise guidance to keep diverted traffic on the correct path without confusion.

This sign directs all traffic following the official detour to bear left ahead, taking a diagonal leftward path rather than continuing straight or making a sharp left turn.

The 'upper left' trajectory typically refers to taking the left-hand option where roads diverge at an angle, often at Y-junctions or motorway slip roads.

It's a mandatory instruction that ensures diverted traffic follows the specific route designed to handle the additional volume safely while bypassing the closure or roadworks.

The bearing left direction prevents drivers from taking the wrong fork and helps maintain orderly traffic flow through complex junction layouts that might otherwise cause confusion during detour conditions.

Failure to follow the upper left direction as instructed constitutes non-compliance with official traffic management under Irish Road Traffic regulations.

Taking the wrong fork or continuing straight instead of bearing left can result in fixed penalty notices of €80 for breach of temporary traffic orders.

If the incorrect route choice leads to accessing restricted areas, entering closed roads, or interfering with construction work, penalties increase to €2,000 fines with 2 penalty points for careless driving.

More serious violations where drivers cause accidents or endanger workers by ignoring the upper left instruction may result in dangerous driving charges with fines up to €5,000, potential imprisonment up to 6 months, and mandatory disqualification.

Complex junctions with detours are often monitored by traffic enforcement officers.

The Irish driving theory test includes scenarios involving complex detour directions, including upper left trajectories at multi-exit junctions.

You need to understand that these directional instructions are legally binding and take precedence over normal route preferences.

Theory questions may present junction diagrams where you must identify the correct path when following detour signs with specific directional indicators.

During practical driving tests, proper response to complex detour directions demonstrates advanced road reading skills and the ability to follow precise instructions under pressure.

Examiners assess whether you can interpret directional signs accurately, position your vehicle correctly for the required maneuver, and execute the bearing left safely without hesitation or confusion about the intended path.