Pull-Through Signs

Pull-Through signs (see Figure 3‑5 for example) are overhead Lane-Use signs intended for through traffic. Pull-Through signs are addressed in Section 2E.11 of the Texas MUTCD.
Pull-Through sign. (click in image to see full-size image)
Figure 3-5. Pull-Through sign.
Application.
 Pull-Through signs should only be used to identify the through lanes when it may not be readily evident to the road user which lanes are the through lanes.
Design.
 Minimum letter height requirements (as shown in Table 2E-2.1 of the Texas MUTCD) are as follows:
Destination
16 inches for uppercase
Cardinal direction
12 inches
1- or 2-digit shield
36 inches × 36 inches
3-digit shield
45 inches × 36 inches
Pull-Through signs should only include Route signs, cardinal directions, and major destinations (or control city). Down arrows should be used for clarity when the alignment and number of through lanes is not readily evident. When down arrows are used, an arrow should be positioned above each lane to which the Pull-Through sign applies.
Placement.
 When an overhead sign bridge is provided, a Pull-Through sign should be provided over the appropriate lanes (on same structure as the Exit Direction sign).