Knowledge Compendium

For pre-2009 projects, please see our index of archived project pages.

Publication and Assessment Scheme

The Depart­ment for Transport’s (DfT) Pub­li­ca­tion Scheme for research projects is being imple­mented by High­ways Eng­land to ful­fil its oblig­a­tions under the Free­dom of Infor­ma­tion Act 2000. As such, we will work to make our research avail­able via the Knowl­edge Com­pendium. This applies to research com­pleted after 30 Novem­ber 2002. Where pos­si­ble, an assess­ment level will be pro­vided by the Project Spon­sor to eval­u­ate the sta­tus of the results. Com­mer­cially sen­si­tive or Infor­ma­tion exempt under one of the FOI exemp­tions will not be published.

For projects falling under the scheme, a pub­li­ca­tions page will be acces­si­ble directly from the project record con­tain­ing an Exec­u­tive Sum­mary, the assess­ment sta­tus, and out­puts attached in PDF.

The 6 defined assess­ment lev­els are listed below:


The research has not been assessed yet. Note that all research com­pleted before 30 Novem­ber 2002 does not fall under the scheme and will not be assessed.

Defin­i­tive evidence

The results are qual­ity assured and peer reviewed to a level that they are not expected to be chal­lenged. They will be a crit­i­cal part of the evi­dence base to inform policy.

Addi­tion to the evi­dence pool

The results are rel­e­vant to be used along with other evi­dence in the for­mu­la­tion of pol­icy when they may be sub­jected to fur­ther cri­tique and challenge.

Incon­clu­sive evidence

The results have a level of uncer­tainty such that they are unlikely to be rel­e­vant to the for­mu­la­tion of policy.

Rejected or terminated

The results are of insuf­fi­cient qual­ity to be rel­e­vant to the for­mu­la­tion of pol­icy or the project is not com­pleted, either due to insuf­fi­cient evi­dence to jus­tify con­tin­u­a­tion or pos­si­ble con­trac­tual intervention.

Spe­cific Assessment

Please see the exec­u­tive sum­mary for fur­ther details on why this assess­ment level was chosen.