Austin City Council changed the speed limits on sections of Davis Lane and Convict Hill Road in August.
The new speed limits do not take effect until new signs are posted. Austin Transportation Department spokeswoman Leah Fillion said the new signs were scheduled to be posted Sept. 21.
According to background documents, the city conducted speed zone investigations in April to determine appropriate speed limits for the two roads.
The Austin Transportation Department then made recommendations based on the investigation findings.
