IIT Kharagpur finds targeted speed-management measures significantly lower operating speeds, fatal crashes and severity – evidence to guide policy for halving road deaths by 2030.
Evidence from the field
A new study by IIT Kharagpur demonstrates that design-driven speed management interventions substantially reduce fatal crash risk on Indian highways. Researchers evaluated a 51‑km stretch of NH‑16 between Balihati and Kolaghat in West Bengal and recorded marked declines in operating speeds and crash severity after applying context‑sensitive measures. The findings, presented at a high‑level road safety dialogue organised by the Road Safety Network with IIT Kharagpur, also provide actionable evidence for policymakers working to achieve India’s target of halving road deaths and serious injuries by 2030.
What the interventions involved
The study implemented design-based speed management measures tailored to the corridor’s function and road user mix. While the report focuses on outcomes rather than granular engineering blueprints, such measures typically include geometric adjustments, gateway treatments, raised crossings, speed‑calming roundabouts, access control, and visual cues that encourage safer driving behaviour. The idea follows the Safe System approach: design roads so inevitable human errors do not become fatal.
Measured impact on speeds and vehicles
The interventions delivered substantial speed reductions across vehicle classes. Operating speeds dropped by 39–45% for cars, 29–33% for heavy vehicles, and 18–28% for two‑wheelers at treated locations. Lower speeds directly reduce stopping distances, lessen impact forces in collisions, and improve the survivability of vulnerable road users. These behavioural shifts form the proximal cause behind the downstream reductions in crashes and fatalities observed by the research team.
Reduction in crashes and fatalities
Beyond lower speeds, the study recorded significant reductions in fatal crashes, total fatalities, and crash severity where interventions were in place. Researchers also noted a decreased probability that a crash would result in a death at treated locations. These outcome also measures make a compelling causal case: aligning design and speed with road function materially reduces harm on high‑risk corridors.
Context: India’s road safety crisis
India continues to face a severe road safety challenge. The Ministry of Road Transport and Highways’ Road Accidents in India 2024 report recorded over 1.8 lakh fatalities in 2024, with speeding cited as a factor in 62% of crashes. Pedestrians remain disproportionately affected, accounting for 20.6% of road deaths. Against this backdrop, the IIT Kharagpur study also adds empirical weight to calls for systemic speed management across national and state highways.
Expert perspective and the Safe System
Prof. Bhargab Maitra of IIT Kharagpur, who contributed to the study and serves on the Road Safety Network, emphasised the Safe System principle: “While people may make mistakes, our roads, policies and systems must be designed to ensure those mistakes do not result in fatalities or serious injuries.” He argued that aligning operating speeds with road function and the needs of vulnerable users – pedestrians, cyclists, and two‑wheelers – remains essential to reducing fatalities.
Policy recommendations from the dialogue
The Road Safety Network presented policy recommendations to the Ministry of Road Transport and Highways and state authorities during the dialogue. Key proposals include:
- Rationalise speed limits based on road function and user risk.
- Adopt context‑sensitive speed zoning frameworks to match local conditions.
- Strengthen road infrastructure and access control to reduce conflict points.
- Expand technology‑enabled enforcement (speed cameras, average speed checks).
- Improve crash data systems for better targeting and evaluation.
- Enhance institutional coordination across transport, enforcement, health and urban development sectors.
Multi‑stakeholder engagement
The dialogue convened government officials, public health experts, researchers and road safety practitioners, including representatives from WHO, SaveLIFE Foundation, Parisar, and the West Bengal government. This cross‑sector participation reflects the multifaceted nature of road safety, which requires engineering, enforcement, emergency response and public‑health interventions working in concert.
Scaling interventions and implementation challenges
While the NH‑16 results are promising, scaling requires political will, funding, and institutional capacity. Authorities must prioritise hotspots using robust crash data, design interventions that respect local contexts, and maintain continuous monitoring to refine treatments. Technology can amplify enforcement, but community engagement and clear communication remain crucial to acceptance, especially where access control or speed limits change long‑standing travel behaviors.
A data-driven path to 2030 goals
The IIT Kharagpur study provides the kind of evidence policymakers need to shift from ad hoc measures to systematic speed management across India’s highway network. By targeting speed as a proximal risk factor and using design interventions to embed safe behaviour, authorities can achieve measurable reductions in fatalities. Combined with improved enforcement and post‑crash care, these interventions also form a practical, data-driven pathway to meet India’s 2030 road‑safety targets.
Conclusion: design for safety
The study reinforces a simple but powerful message: roads that reflect their intended function – and that manage speeds accordingly – save lives. With over 1.8 lakh fatalities in 2024, India cannot afford to overlook design‑led speed management. Implementing context‑sensitive measures at scale, supported by enforcement and better data systems, also offers a realistic route to reduce deaths and make highways safer for all users.
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