If non-standard equipment is called for on a project, it may be specified by special specification or by special provision. A special specification is a supplemental specification not covered by the standard specifications. A special provision is an addition or revision to a standard specification or a special specification.

Special specifications and special provisions must be submitted via email to CST_RDWY_SPECS@txdot.gov for approval before using them on a project. Previously used special specifications and provisions are available on the TxDOT website and may be resubmitted for new projects.