The design is the visual features of the CONSTRUCTION BARRIER shown in the drawings, whether those features are features of one of shape, configuration, ornament or pattern, or a combination of any of these features. The drawings show three designs of the construction barrier which do not differ substantially from each other. Figures 1 to 7 show a first variant of the CONSTRUCTION BARRIER. Figures 8 to 14 show a second variant of the CONSTRUCTION BARRIER. Figures 15 to 21 show a third variant of the CONSTRUCTION BARRIER.The portions of the designs that are shown in dotted and broken lines are for illustrative purposes only and do not form part of the claimed design. Break lines are used to illustrate indefinite length.Figure 1 is a perspective view of a first variant of a construction barrier;Figure 2 is a front view of the first variant of a construction barrier of Figure 1;Figure 3 is a rear view of the first variant of a construction barrier of Figure 1;Figure 4 is a top view of the first variant of a construction barrier of Figure 1;Figure 5 is a bottom view of the first variant of a construction barrier of Figure 1;Figure 6 is a left side view of the first variant of a construction barrier of Figure 1;Figure 7 is a right side view of the first variant of a construction barrier of Figure 1;Figure 8 is a perspective view of a second variant of a construction barrier;Figure 9 is a front view of the second variant of a construction barrier of Figure 8;Figure 10 is a rear view of the second variant of a construction barrier of Figure 8;Figure 11 is a top view of the second variant of a construction barrier of Figure 8;Figure 12 is a bottom view of the second variant of a construction barrier of Figure 8;Figure 13 is a left side view of the second variant of a construction barrier of Figure 8;Figure 14 is a right side view of the second variant of a construction barrier of Figure 8;Figure 15 is a perspective view of a third variant of a construction barrier;Figure 16 is a front view of the third variant of a construction barrier of Figure 15;Figure 17 is a rear view of the third variant of a construction barrier of Figure 15;Figure 18 is a top view of the third variant of a construction barrier of Figure 15;Figure 19 is a bottom view of the third variant of a construction barrier of Figure 15;Figure 20 is a left side view of the third variant of a construction barrier of Figure 15; andFigure 21 is a right side view of the third variant of a construction barrier of Figure 15.