A ramp wing walker reported they used their wands to stop a truck on a temporary roadway abeam the ramp from coming into contact with an aircraft being pushed back.

Narrative

Due to construction at ZZZ the roadway at concourse 1/2 has been temporarily moved further into (north) taxiway 1. This has narrowed taxiway 1 significantly. Due to this when pushing aircraft from Gate X and Gate Y must be pushed parallel to the runway (East; West) and in the direction of departure. In this case XXR. This is to avoid the wing from going over the temporary roadway when turning to taxi either east or west. which is used by general airport auto traffic. We had three departures at roughly the same time XA:00 Gate Y; XA:00 Gate Z and XA:05 Gate X. Both Gate Z and Gate Y had already pushed back. Both pushed correctly facing east (tail west) for taxi to runway XXR. Due to Gate Y pushed back and slightly behind Gate X; Gate X could not push back. Waiting for the A/C from Gate Y (ABAC) to taxi east. I was wing walker for Gate X No. 2 engine side. I was near roadway to direct auto traffic on temporary roadway. With both A/C off Gate Y and Gate Z both facing east and Gate X unable to push I allowed a large truck to proceed from west to east. Just prior to the truck passing me the A/C from Gate Y started turning from facing east to taxing west. I immediately crossed my lighted wands and yelled as loud as I could for the truck to stop. As the A/C from Gate Y could not make the turn from facing east to facing west without the wing from going over the roadway exactly where the truck would be driving. The truck did stop and had to back up to get out of the way of the turning A/C. It is my understanding the FAA (tower) has given us explicit direction to push A/C either nose east or west depending on runway being used. Which is exactly what the push crew on Gate Y did. The tower gave direction to the Gate Y A/C (I am assuming) to turn from pointing east to west to use Taxiway 2 X (west) instead of Taxiway 2 X (east) The A/C from Gate Y was blocking the A/C from Gate Y from taxing. I am not aware of the communication between A/C and tower.