The overall goal of this project is to enhance SCDOT’s current access management practices resulting in a reduction in crashes, injuries, and fatalities on South Carolina roadways as well as improved traffic flow.
Findings & Conclusions
Traffic Volume Thresholds for Identifying Driveway Turn Restrictions - Dr Karen Dixon, Texas A & M Transportation Institute, USA
pdf (784KB)
Access Management 2016 - CSIR Convention Centre - 6 & 7 July
Open & Welcome - Hein Stander
pdf (2.73MB)
Welcome by SAICE Transportation Division - Robin Chetty
pdf (1.56MB)
Opening Address - Kobus van der Walt, SANRAL
pdf (1.26MB)
Menu of all presentations from the 2012 10th National Conference on Access Management and TxDOT Planning Conference in Dallas Texas.
The Values We Used To Craft A Successful Review Process
Process should be consistent
Need to involve a multi-disciplinary management level team in each district
Communication between all parties is critical throughout the process
Florida DOT staff will use creativity and flexibility to resolve issues
Some Closing Thoughts
Look for solutions within your organization
We found a model process in one of our districts.
Traffic Operational Analyses (TOA)
A TOA will be required for all development projects that are expected to generate 200 or more vehicle trips per day and for which a Traffic Impact Study (TIS) was not completed.
A TOA will be required for any development project for which changes in land use are intended after the completion of a TIS or TOA, if enough additional vehicle trips are being generated beyond those accounted for in the TIS or TOA, as determined by the County Coordinator.
Proposed Changes & Improvements
Use the county assessed value as the baseline value for calculating the difference vs. going through a costly and time consuming appraisal process.
Charge only a percentage of the determined value for changes to residential (less than 10 dwellings) and farm access.
Charge full amount of determined value for commercial, retail, etc
Charge an administrative fee for processing requests.
Access Spacing and Corner Clearance
Corner Clearance is the distance provided between a roadway intersection and the nearest access connection
Corner Clearance is a special case of access connection spacing
NCHRP 15-35, Geometric Design of Driveways
Many years since comprehensive national guidelines for the geometric design of driveways
Issues to Address
Oregon State University
AM1220Dixon
As part of the AMAG project, Karen Dixon used a driving simulator to study the driver perception - reaction time of drivers of different ages.
Overview
Next Steps
Overview Review of Sight Distance Components Common Sight Distance Applications to Access Management Sight Distance What, When, and Where Concluding Remarks Slide Titles Another Look at Sight Distance Applications for Access Management Overview Sight Distance Review of Candidate Sight Distances Basic SSD Assumptions Review of Candidate Sight Distances Basic DSD Assumptions Review of Candidate Sight Distances Common Applications That Consider Sight Distance for Access Management Looking at Stopping & Decision Sight Distance Assumptions Basic Questions Stopping Sight Distance fo
Access Management Regulations Roadway Classification Access Management Standards Permitting Retrofit Projects Cost is borne by the public Benefits accrue to the public Conclusions B/C criteria are applicable to retrofit projects Warrants for permitting should be lower than for retrofit
