Agenda

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C. 10

To:	Board of Supervisors
From:	Brian M. Balbas, Public Works Director/Chief Engineer
Date:	March 31, 2020

Contra

Costa

County

Subject:

Establish speed limits on Camino Diablo (Road No. 7941), Byron area.

APPROVE	OTHER
RECOMMENDATION OF CNTY ADMINISTRATOR	RECOMMENDATION OF BOARD COMMITTEE

Action of Board On: 03/31/2020

APPROVED AS RECOMMENDED

OTHER

Clerks Notes:

VOTE OF SUPERVISORS

AYE:

John Gioia, District I Supervisor
Candace Andersen, District II Supervisor
Diane Burgis, District III Supervisor
Karen Mitchoff, District IV Supervisor
Federal D. Glover, District V Supervisor

Contact:

Monish Sen, 925.313.2187

I hereby certify that this is a true and correct copy of an action taken and entered on the minutes of the Board of Supervisors on the date shown.
ATTESTED: March 31, 2020
David Twa,

BY:	, Deputy

RECOMMENDATION(S):

RESCIND Traffic Resolution No. 2009/4303, and ADOPT Traffic Resolution No. 2020/4492 to establish speed limits on Camino Diablo (Road No. 7941), as recommended by the Public Works Director, Byron area. (District III)

FISCAL IMPACT:

No fiscal impact.

BACKGROUND:

Camino Diablo is classified as a minor arterial roadway by the Federal Highway Administration. Such a classification requires that the speed limit be set according to standards set by the California Manual on Uniform Traffic Control Devices (CA MUTCD) and California Vehicle Code (CVC) 22358, if the speed limit is to be set lower than the prima facie speed limit of 55 mph. This requires an Engineering and Traffic Survey (E&TS) to be conducted to establish an appropriate speed limit. On January 28, 2020, January 29, 2020 and January 30, 2020, an E&TS was conducted accordingly to established traffic engineering standards on three sections of Camino Diablo. Based on the results of the E&TS, the Traffic Engineer recommends the establishment of a speed limit of 50 mph for the portion of Camino Diablo between Marsh Creek Road and Vasco Road in Byron, and thence 45 mph from Vasco Road to 400’ west of McCabe Road in Byron, and thence 30 mph from 400’ west of McCabe Road to Byron Highway in Byron. The 50 mph and 45 mph portions are two-lane, primarily rural/farming area divided by a painted centerline. The 30 mph portion is a two-lane, primarily farming and residential area divided by a painted centerline. This action will allow local law enforcement agencies to enforce the speed limits on Camino Diablo.

CONSEQUENCE OF NEGATIVE ACTION:

Law enforcement would not be able to enforce speed limits on Camino Diablo.