Where TxDOT is responsible for signing school speed zones, the zones shall be signed with a combination of the S4-3 SCHOOL and the R2-1 SPEED LIMIT sign assembly. Flashing beacons shall also be used with the S4-4 WHEN FLASHING sign to identify the periods the school speed limit is in force. One sign, S5-1, could be used, which is a combination of these. The S5-1 SCHOOL SPEED LIMIT XX WHEN FLASHING may be used in place of the S4-3, R2-1, and S4-4. A Transportation Commission minute order, city ordinance, or county ordinance authorizing the reduced speed limit is required prior to use of these signs in school zones.

Cities should be allowed to sign school speed zones in accordance with the other options set out in the Texas Manual on Uniform Traffic Control Devices ( ).

The S4-3, R2-1 and S4-4 sign assembly with flashers shall be mounted on a permanent type mounting and placed at each zone limit of the section of highway, road, or street through which the speed limit has been reduced. The sign assembly with flashing beacons may be placed off the shoulder of the road, in the median, or overhead to face traffic entering the school speed zone. An illustration of signing for school speed zones is shown in the TMUTCD. Other types of signs used by cities should be similarly located in conformance with the TMUTCD.