PRACTICAL ROAD SAFETY ENGINEERING Road Safety Audit Workshop

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PRACTICAL ROAD SAFETY ENGINEERING Road Safety Audit Workshop 10 July 1018 Louis Roodt Pr

PRACTICAL ROAD SAFETY ENGINEERING Road Safety Audit Workshop 10 July 1018 Louis Roodt Pr Eng Ph. D

RSA is the Republic of South Africa The acronym RSA is one of 96

RSA is the Republic of South Africa The acronym RSA is one of 96 listed on www. Acronymlist. com that includes Repair Service Attendant Road Side Accident Rural Service Area Road-Side Assistance Retirement Savings Account

An appropriate Road Safety Audit acronym? ? • • • Research Society on Alcoholism

An appropriate Road Safety Audit acronym? ? • • • Research Society on Alcoholism Responsible Serving of Alcohol Russian Space Agency Red Star Army Responsible Serving of Alcohol • Propose RSAudit

Clients’ expectations from RSAudit • SANRAL wants findings for high and extreme risk

Clients’ expectations from RSAudit • SANRAL wants findings for high and extreme risk

Clients’ expectations from RSAudit • SANRAL wants findings for high and extreme risk •

Clients’ expectations from RSAudit • SANRAL wants findings for high and extreme risk • Clients want design check • Clients want to pass risk to the auditors • Consultants want design check • Road safety assessment as part of audit

Practical engineering questions • What to report if there is no safety risk: good

Practical engineering questions • What to report if there is no safety risk: good design • What to report if the design report adequately explains the design exemptions • What to report if the design standards are known to be high (SSD based on h=0. 15)

Personal preferences of auditors Auditors • Are human • Have personal experiences • Have

Personal preferences of auditors Auditors • Are human • Have personal experiences • Have specific knowledge • What is yours? ? ?

Personal preferences of auditors Slipways and intersection angles

Personal preferences of auditors Slipways and intersection angles

Personal preferences of auditors Slipways and intersection angles

Personal preferences of auditors Slipways and intersection angles

Personal preferences of auditors Trees next to road

Personal preferences of auditors Trees next to road

Practical aspects of RSAudit • Site visit relevance and context • What if the

Practical aspects of RSAudit • Site visit relevance and context • What if the existing road is completely redesigned • Extreme hazards to be reported • Separate letter • Maintenance laxities • Road signs and markings • Vegetation

Preliminary design issues 1 • Rest areas • Tourism facilities e. g. Kaaimans lookout

Preliminary design issues 1 • Rest areas • Tourism facilities e. g. Kaaimans lookout • Lay-byes • Vegetation • Landscaping on medians • Mist belts • Access control

Preliminary design issues 1 • Rest areas • Tourism facilities e. g. Kaaimans lookout

Preliminary design issues 1 • Rest areas • Tourism facilities e. g. Kaaimans lookout • Lay-byes • Vegetation • Landscaping on medians • Mist belts • Access control

Preliminary design issues 2 • Auxiliary lanes • Separation of low-speed and high-speed traffic

Preliminary design issues 2 • Auxiliary lanes • Separation of low-speed and high-speed traffic • High-speed two-way traffic • Rural four lane roads: divided or not • Lane widths • Shoulder widths

Preliminary design issues 3 • Lack of recovery area / lateral clearance • Low

Preliminary design issues 3 • Lack of recovery area / lateral clearance • Low Fill • Cut with side drain • Culvert head walls • Drainage • Superelevation

Issues relating to roadworks and traffic accommodation • Standards details • Project specific exceptions

Issues relating to roadworks and traffic accommodation • Standards details • Project specific exceptions • Separation of workers • Detours • Delay at one way working

Good practice and standard details 1 • Guardrails: lengths and starts, end treatment •

Good practice and standard details 1 • Guardrails: lengths and starts, end treatment • Hazard markers and chevrons • Bridge balustrades and transition from guardrails • Protection for bridge piers • Location of bus and taxi stops • Universal access

Good practice and standard details 2 • Wrong markings • Consistent signage • Signage

Good practice and standard details 2 • Wrong markings • Consistent signage • Signage at T-junctions: line of sight or offset? • Signage at roundabouts • Landscaping on roundabouts • Pedestrians at roundabouts

High risk issues in detail designs 1 • Slipways: high and low speed designs

High risk issues in detail designs 1 • Slipways: high and low speed designs • NMT / pedestrian accommodation at slipways • NMT / pedestrian accommodation at roundabouts • Tapers • Oblique intersections for trucks

High risk issues in detail designs 2 • Ribbon development • Schools • Transitions

High risk issues in detail designs 2 • Ribbon development • Schools • Transitions rural to urban • NMT / Pedestrian facilities • Public transport • Rail crossings

RSAudit response • Lack thereof • Inadequate feedback • No design exceptions registers •

RSAudit response • Lack thereof • Inadequate feedback • No design exceptions registers • No institutional memory of good practice

Way forward? • Sharing information • High standards of design • Ultimately out of

Way forward? • Sharing information • High standards of design • Ultimately out of work • The End