Illustrative catalogue. Services, rates, agreements and requests are examples. Values in [brackets] are to be agreed with Globalvia.

Road safety studies and hotspot analysis

Collision hotspot analysis

Request quoteLimited sample availableUses iMAAP

Find the sites driving the KSI rate and the treatments that fit them.

The problem it solves

A concession’s KSI rate is above target, or collisions cluster without a clear cause. Network-level figures show that there is a problem, but not which sites to treat first or what will work.

Scope

Included

Check of collision data completeness and location accuracy
Clustering by location, severity, time of day, lighting and surface condition
Ranking of sites by severity-weighted collision frequency
Pattern analysis for the top-ranked sites
Countermeasure options for each site, drawing on published evidence
Prioritised treatment list and a briefing session

Optional, priced in the quote

Site visits or survey-video review of top sites
Before-and-after monitoring plan

Not included

Detailed design of treatments
Works supervision

Inputs required

Inputs the service needs, where they usually come from, and whether they are in OneTRL now
Input	Usual source	Needed	In OneTRL now
Collision records, [3–5] years, with location and severity	Concession or road authority	Required	Available
Traffic volumes by section	Concession traffic counts	Required	Available
Network referencing (PK)	OneTRL network model	Required	Available
Road inventory: speed limits, junctions, barriers	Asset register	Helpful	Partial
Survey video of the sections	Concession	Optional	Not loaded

Data already in OneTRL is shared with TRL only after you approve access in the request.

Example deliverables

Hotspot report (PDF), with findings for each priority site
Ranked site list (XLSX)
GIS layer of hotspots (GeoJSON or shapefile)
Briefing session with your safety and operations teams

Sample output: illustrative dataNot from your network. Shows the format of the ranked site list only.View sample

Sample output, illustrative data
Rank	Site	KSI, 5 years	Main pattern	Candidate treatments
1	Sample site A · junction	[n]	Right-turn conflicts at night	Lighting, turn lane, signing
2	Sample site B · curve	[n]	Run-off-road in wet conditions	Skid resistance, chevrons, barrier
3	Sample site C · merge	[n]	Rear-end at peak hours	Merge layout, queue warning

The full deliverable covers every ranked site, with maps, collision diagrams and evidence for each treatment.

Typical delivery steps

Scoping callAgree concession, period, priorities and data access.TRL and Globalvia
Data checkCheck completeness and location accuracy. Share a short data report.TRL
AnalysisCluster, rank and examine the patterns at each priority site.TRL
Draft findingsReview ranked sites and treatment options with your team.TRL and Globalvia
Final reportIssue report, site list and GIS layer.TRL
BriefingWalk your safety and operations teams through the results.TRL and Globalvia

Timings are set in the quote and start when the required inputs are received.

Assumptions

Collision records include a usable location for most records. TRL reports the share that cannot be located.
Globalvia provides inputs and approves data access within [x] working days of accepting the quote.
Findings are advisory. Treatment design and works need a separate scope.
Any expected effect of a treatment is a range from published evidence, not a guaranteed result.

Relevant TRL expertise

Road safety researchTRL’s road safety work traces back to the Road Research Laboratory, founded in 1933.

iMAAPTRL’s collision data system, used for clustering and site ranking.

Case studies[Approved case study 1] · [Approved case study 2]

Scope

Included

Check of collision data completeness and location accuracy
Clustering by location, severity, time of day, lighting and surface condition
Ranking of sites by severity-weighted collision frequency
Pattern analysis for the top-ranked sites
Countermeasure options for each site, drawing on published evidence
Prioritised treatment list and a briefing session

Optional, priced in the quote

Site visits or survey-video review of top sites
Before-and-after monitoring plan

Not included

Detailed design of treatments
Works supervision

Inputs required

Inputs the service needs, where they usually come from, and whether they are in OneTRL now
Input	Usual source	Needed	In OneTRL now
Collision records, [3–5] years, with location and severity	Concession or road authority	Required	Available
Traffic volumes by section	Concession traffic counts	Required	Available
Network referencing (PK)	OneTRL network model	Required	Available
Road inventory: speed limits, junctions, barriers	Asset register	Helpful	Partial
Survey video of the sections	Concession	Optional	Not loaded

Data already in OneTRL is shared with TRL only after you approve access in the request.

Example deliverables

Hotspot report (PDF), with findings for each priority site

Ranked site list (XLSX)

GIS layer of hotspots (GeoJSON or shapefile)

Briefing session with your safety and operations teams

Sample output: illustrative dataNot from your network. Shows the format of the ranked site list only.View sample

Sample output, illustrative data
Rank	Site	KSI, 5 years	Main pattern	Candidate treatments
1	Sample site A · junction	[n]	Right-turn conflicts at night	Lighting, turn lane, signing
2	Sample site B · curve	[n]	Run-off-road in wet conditions	Skid resistance, chevrons, barrier
3	Sample site C · merge	[n]	Rear-end at peak hours	Merge layout, queue warning

The full deliverable covers every ranked site, with maps, collision diagrams and evidence for each treatment.

Typical delivery steps

Scoping callAgree concession, period, priorities and data access.TRL and Globalvia

Data checkCheck completeness and location accuracy. Share a short data report.TRL

AnalysisCluster, rank and examine the patterns at each priority site.TRL

Draft findingsReview ranked sites and treatment options with your team.TRL and Globalvia

Final reportIssue report, site list and GIS layer.TRL

BriefingWalk your safety and operations teams through the results.TRL and Globalvia

Timings are set in the quote and start when the required inputs are received.

Assumptions

Collision records include a usable location for most records. TRL reports the share that cannot be located.

Globalvia provides inputs and approves data access within [x] working days of accepting the quote.

Findings are advisory. Treatment design and works need a separate scope.

Any expected effect of a treatment is a range from published evidence, not a guaranteed result.