OnSafety™Safety Treatment Manager
Focus your attention where it’s needed.
Integrate all your data for effective management of safety treatments using a single application.
ITIS’ OnSafety™ Safety Treatment Manager (STM) is a robust data-driven decision support application that helps Safety Engineers build an integrated system for handling safety locations and their related treatments options, on a program basis.
Increase your potential to reduce the frequency and severity of future crashes
Help your engineers make faster, more informed decisions about where and what safety treatments to deploy.
The OnSafety™ Safety Treatment Manager consolidates crash and roadway feature data, automatically performs calculations to evaluate potential safety countermeasures, prevalence of crash factors, and dominant risk levels from CMFs, and presents information in a way that facilitates understanding. It also enables collaboration between various agencies’ programs and keeps track of what treatments have been applied and where.
Evaluate treatment costs from a site perspective or a treatment perspective.
The Safety Locations’ dashboard acts as a central hub for performing site economic analysis. The Treatment Locations’ dashboard is used to locate treatments, compute benefit to cost figures for treatments applied to the site, and track the status of treatments.
The Safety Locations list page displays:
- Location (route name, route mileage)
- Facility type (road type)
- Safety index score
- Treatment counts
- Location status
Safety Locations functions:
- Import/add/edit safety locations
- View location crash statistics
- Calculate safety index scores
- View roadway statistics
- View site map
- Track location status
- Track location assignment/approval
The Treatment Locations list page displays:
- Benefit to cost
- Treatment status
Treatment Locations functions:
- Add/edit treatment locations
- Apply treatment to location and calculate benefits to costs
- Track treatment status
- Track treatment assignment/approval
The Treatment Library contains a summary of:
- Treatment names
- CMF notes
- CMF values
- Lifecycle cost
- Cost notes
- Crash type
- Location type
Safety Issue Identification
STM supports multi-user ability to identify locations of concern. Safety Locations may be identified through safety studies, reported by the public, etc. For example, the highway safety user may choose to add locations based on theme studies (such as studies conducted on curves, high-speed rural intersections, etc.), or on general scans, such as the Hot Spot Analysis.
Safety Treatment Manager allows Safety Locations to be logged and made available for review. Locations of interest can be prioritized by crash counts, severities, and rates, or by risk (all are determined using the Highway Safety Manual’s predictive methods.
Safety Issue Quantification
STM reveals information about the severity of the safety concern at identified locations. A series of safety scores are assigned based on the frequency and severity of crashes occurring at that location.
Safety Treatment Manager’s scores are based on HSM predictive modeling. Safety Engineers use the scores to quickly focus economic resources on locations identified as having the highest potential for a reduction of crashes.
- Safety Index Score – Absolute value for individual location
- Safety Index Compare Score – A statewide score for comparing like segments (based on facility type) against each other
- Safety Index Rating (statewide) – A score used to identify groups of segments with the highest potential for improvement
- Safety Location – We model expected crashes by severity
- Expected Critical Crashes Per Mile Per Year
- Serious Crashes
- Damage Crashes
Identify appropriate treatments (counter-measures) to consider for each safety location:
- Treatment selection is supported by information on relative Severity Index scoring, types of crashes occurring, and more.
- Your agency’s approved list of counter-measures, with their life cycle costs and crash modification factors, makes selection easy.
- Immediate feedback is given on the cost-effectiveness of each potential counter-measure.
Analyze Safety Locations to understand:
- What kinds of crashes have been occurring
- What kinds of risks exist (based on CMFs)
- What kinds of safety-related treatments have already been deployed
Crash modification factors (CMFs) are used to compute the expected number of crashes after deploying a countermeasure on a roadway segment or intersection, using measures like the lifecycle benefit and annual critical crash reductions values to evaluate treatment options.
Safety Treatment Library
The STM includes a Safety Treatment Library or remedy repository where engineers can create, edit, and manage potential safety treatments for both roadway segments and intersections. Treatments are assigned a name, a description, a type (intersection or segment treatment), CMF value, lifecycle duration and cost, and the types of crashes the treatment is expected to affect, and status as either an active or rejected type of treatment.
Safety Treatment Manager makes use of HSM Predictive Methods
The STM application quickly consolidates and presents information, evaluates expected improvements from proposed actions, and helps prioritize potential safety treatments for each identified safety location.
As recommended by the Federal Highway Association (FHWA) and the American Association of State Highway Transportation Officials (AASHTO), ITIS’ Safety Treatment Manager uses the Highway Safety Manual’s (HSM) predictive method to better quantify the frequency and severity of crashes that can be expected to occur without intervention, as well as quantifying the expected future crash counts to be considered in road planning, design, construction, operation, and maintenance.
Rather than relying solely on crash history, the HSM predictive method combines crash history with predicted crashes from calibrated models. This approach reduces the effect of natural variations of crash data and results in higher confidence of the crash numbers to estimate the expected crash frequency (crashes per mile per year) and severity of a roadway, based on existing conditions and characteristics at each location.
By using the HSM Predictive methodology built in to the OnSafety™ Safety Treatment Manager, Safety Engineers are able to facilitate roadway resource allocation decisions based on the explicit consideration of their effects on potential future crash frequency and severity.