The Transportation Section maintains approximately 2,500 miles of County roads in the unincorporated communities of San Bernardino County. Our goal is simple: safe roads, reliable travel, and responsive service for the communities we serve.

How We Support Your Community 

Our teams work every day to maintain and improve: 

  • Roads and potholes 
  • Traffic signals and flashing beacons 
  • Street signs and pavement markings 
  • Bridges and culverts 
  • Drainage systems that prevent flooding 
  • Guardrails and roadway safety features 
  • Storm and wildfire damage 

See Something? Let Us Know. 

If you notice a roadway issue in an unincorporated area, we want to hear from you. Your reports help us respond quickly and prioritize repairs. 

Traffic signal not working: 
Business hours: (909) 387-8186 
After hours, weekends, holidays: (909) 356-3805 
Email: Dpw-traffic@dpw.sbcounty.gov 

Potholes, damaged signs, drainage issues, or other concerns: 
See Click Fix – Public Works 
After hours, weekends, holidays: (909) 356-3805 
Please provide the location and a brief description so we can assist you as efficiently as possible. 

Traffic Safety Requests 

Residents can request a review for: 

  • Stop signs 
  • Speed limit signs 
  • Street name signs 
  • No parking signs 
  • Crosswalk markings 
  • Request to rename Road

Every request is carefully evaluated using traffic engineering and safety standards to help ensure decisions are consistent and community-focused. 

Call (909) 387-8186 or email Dpw-traffic@dpw.sbcounty.gov to submit a request. 

Development Review 

When new development is proposed in unincorporated areas, our Traffic Division reviews projects to ensure roadways remain safe and efficient as the community grows. 

Projects that generate significant traffic, typically more than 100 peak-hour trips, or are located in congested areas may be required to submit a traffic study. We review and approve traffic studies, trip generation reports, and Vehicle Miles Traveled analyses. 

We also: 

  • Review street improvement plans for proper signing and striping 
  • Determine transportation-related development fees 
  • Ensure roadway improvements meet County standards 

Traffic studies and related documents must be submitted through EZ Online Permitting (EZOP). An initial deposit is required for review. Development-related transportation fees help fund necessary road improvements that support continued growth in our communities. 

Working in the Roadway 

Planning work that affects a County-maintained road? A permit is required to help ensure work is done safely and meets County standards. 

Transportation Permit Division: 
Call (909) 387-1863 or visit: Permits Division – Public Works 

Access to Plans and Records 

Approved street improvement plans for County roads in unincorporated areas are available for public review. 
(909) 387-7940

Frequently Asked Questions

County roads are monitored on a regular basis and assigned a Pavement Condition Index (PCI) number. This rating, along with the average daily traffic, funding availability, and other factors are evaluated to justify new maintenance projects. Some low volume roadways may only receive a minor surface treatment such as a chip seal or slurry seal. Heavily traveled regional or arterial type roadways may receive full asphalt overlay or rehabilitation such as pulverization, milling, or other process. The various strategies are analyzed by the Department’s Pavement Management Division and Transportation Program Management

Contact:
Written comments can be sent to: Department of Public Works – Transportation 825 E. 3rd Street, Room 143 San Bernardino, CA 92415-0835

The County Department of Public Works researches County documents and records about any particular road. Our research confirms whether the road is in the County Maintained Road System (CMRS). In general, due to lack of funds, the County only paves a limited number of existing dirt roads.

If the road or section of road is not in the CMRS, by law (California Streets and Highway Code, Section 2150), the County is not allowed to do any maintenance or repair work on roads that are not in the system. Often, one of the reasons a land purchase, especially in the mountain or desert areas, appears to be a “good deal” is that the road or roads serving the parcel are not in the CMRS. Purchasers should check to see if the road serving their parcel is maintained by the County. Any maintenance or repair work of non-CMRS roads is the responsibility of the respective property owners along that road.

There are basically two options available to property owners who wish to have a dirt road paved if they do not live on a CMRS roadway:

The first option is for the property owners of parcels adjacent to the road to hire a consultant/contractor to pave the road to County Standards at their own expense. Property owners should contact the Department’s Permits section at (909) 387-1863 to see if a permit is required.

The second option is by special road assessment. In many areas, property owners pay a special road assessment for road paving and maintenance. This program is administered by the County through the County Special Districts Department located at:

222 W. Hospitality Lane
San Bernardino, CA 92415
(909) 386-8800

Funds for maintenance and construction of county roads are derived from a variety of sources. The majority of the money available on a yearly basis comes from the State Fuel Tax of 18 cents per gallon. The state allocates fuel taxes and fees which may only be used for transportation purposes to cities and counties statewide.  Generally speaking, the County’s share of the fuel tax funds is proportionally allocated on the number of registered vehicles in the county.


Since San Bernardino is a very large county with many sparsely populated and widely separated communities, the revenue in terms of dollars per mile of road is very low. The more densely populated counties such as Orange or Los Angeles receive ten and five times respectively as much State Fuel tax money per mile of road for their county road systems. Over the years the ability of the County to maintain and improve the road system has been severely affected by inflation. Since the fuel tax is on a per gallon basis, the amount paid by the average driver has actually declined over the last several years due to more fuel-efficient vehicles.  

Other sources of funding include Measure I the 1/2 cent sales tax surcharge passed by the voters in 1989, and extended by the voters in 2006. Many significant County transportation projects have been made possible with this funding. Measure I monies may only be used in the geographic area where it is generated. Measure I monies have defined percentages that must be spent on arterial and local roads.Note:    Property taxes are used for many purposes including education, fire and police protection, but are not used to pave or maintain roads