Move to Left (Two Lanes)

Move to Left (Two Lanes) signs appear on Irish two-lane dual carriageways and motorway sections where entire carriageway alignment shifts leftward to accommodate right-side construction.

Common on M7, M8, and other two-lane motorways during right-side works, on N roads during major construction requiring right-side dedication, and at bridge construction sites where traffic must shift left to pass work zone.

These indicate both lanes continue but in shifted leftward position compared to normal alignment.

Found where right-side work requires dedicating normal right lane and hard shoulder while maintaining two-lane capacity using temporary left-shifted alignment possibly utilizing central reservation area.

Both lanes must shift leftward as entire carriageway alignment moves left to accommodate right-side work while maintaining two-lane operation.

Reduce speed to 60-80 km/h and follow temporary lane markings carefully as road position shifts.

Both drivers regardless of current lane must move left proportionally - right lane becomes positioned where center or center-left normally is, left lane moves to far-left possibly very close to central barrier.

Two lanes continue so reasonable capacity maintained though positioning is unfamiliar.

Enhanced attention required as barriers and edges are in unusual positions relative to normal driving experience on this route.

Continue following shifted alignment until normal position restoration is indicated.

Failure to follow mandated two-lane leftward shift results in lane violation charges: €80-€120 fines with 2 penalty points if continuing in former position now occupied by construction.

Speed violations through shift zones result in €160-€400 fines with 2-5 penalty points, typically doubled for unfamiliar alignment risks.

Poor lane discipline in shifted configurations causing encroachment into adjacent shifted lane results in enhanced prosecution.

Collisions due to failure to follow shift signage result in full liability recognizing clear warning provided.

Two-lane shifts are extensively used on Ireland's two-lane motorways making familiarity with this configuration essential.

Two-lane carriageway shift requirements are covered in Irish theory tests as common temporary configuration on two-lane motorways.

You must recognize that both lanes shift left proportionally while maintaining two-lane capacity in different alignment.

Theory questions test understanding that two-lane shifts maintain reasonable capacity unlike lane closures, recognition of unfamiliar positioning relative to barriers, and appropriate speed adjustments.

Practical assessments on two-lane routes evaluate ability to follow temporary markings, maintain positioning in shifted lanes, and adapt to altered barrier proximity.

Demonstrating two-lane shift understanding shows readiness for Ireland's most common motorway temporary geometry modification.