Someplace in South Africa at present, a household will get a cellphone name nobody needs to obtain. Round 12 000 individuals die on our roads yearly – on the N3, on rural district roads, in taxis, on the way in which to highschool. We’ve got grown so used to those numbers that they barely make the information anymore until the crash is very giant.
However right here is one thing most South Africans don’t know: a number of the most superior life-saving car expertise on this planet was invented proper right here, in South Africa, a long time in the past. We’ve got merely by no means introduced it dwelling to our personal roads.
As a researcher on the CSIR, I work on the engineering that retains troopers alive in essentially the most harmful circumstances possible. It would sound like a wierd place to start out a dialog about your each day commute. However the two are extra linked than you would possibly suppose.
Within the Nineteen Seventies and Eighties, South African engineers designed a army car known as the Casspir, constructed to guard troopers from landmines. Its signature function was a V-shaped hull that deflects the drive of an explosion away and across the car, as a substitute of straight up into the individuals inside. Greater than 2 000 Casspirs have been constructed, and the design proved so efficient that it went on to form the worldwide commonplace for what at present’s armies name MRAPs – mine-resistant, ambush-protected automobiles – utilized by defence forces all over the world. South Africa didn’t simply participate in that story. We began it.
Right here is the purpose that issues for odd street customers: the engineering information constructed by way of the Casspir programme – how buildings take in and redirect vitality, how occupants should be restrained, how a car may be designed in order that human beings survive excessive drive – is straight related to what occurs to a human physique in a critical street crash.
It really works
That is precisely the science that determines whether or not an individual walks away from a collision or doesn’t. We constructed this experience. We proved it really works. And it has by no means been intentionally carried throughout into the design requirements, the taxis, the buses or the security rules that form the automobiles most South Africans truly use.
A sceptical engineer is correct to ask what that switch seems like in observe. The V-shaped hull itself is an underbody-blast resolution – it redirects a strain wave rising vertically from beneath – and that could be a basically completely different load case from the lateral or frontal impression managed by crumple zones, airbags and side-intrusion beams in a street crash. The respectable switch from the Casspir lineage shouldn’t be the hull geometry. It’s the household of subsystems engineered, examined and confirmed alongside it. Three of these translate straight into minibus taxis and scholar transport:
- Vitality-absorbing seating. As a result of a blast impulse travels upward by way of the ground into the seat, Casspir-derivative automobiles required seats mounted on energy-absorbing pylons – “stroking seats” – that restrict the height deceleration drive transmitted to the occupant’s backbone. That very same precept, a seat that yields progressively slightly than transmitting drive rigidly into the passenger, is exactly what’s lacking from South African scholar transport, the place kids sit on inflexible, poorly anchored benches with no restraint. Translating CSIR-derived stroking-seat specs right into a nationwide commonplace for scholar transport wouldn’t require armour; it will require a design rule and an annual compliance test.
- Restraint geometry. The biomechanical evaluation underpinning four-point harness anchor placement in MRAPs – guaranteeing load runs by way of the pelvis and shoulder girdle, not the stomach – is similar to the evaluation wanted to mandate right seatbelt anchorage geometry in minibus taxis, the place rear passengers routinely journey with none restraint in any respect.
- Rollover integrity. The CSIR’s work on roof-crush resistance and occupant survival-space necessities for high-rollover-risk army automobiles maps straight onto a structural design commonplace for minibus taxi B-pillars and roof rails. Rollovers stay one of many highest-fatality crash modes on South African roads.
This isn’t solely about crash survival. It’s in regards to the greater image of a transport system many people expertise as unreliable and unsafe – potholed roads, ageing infrastructure, overloaded scholar transport, a rising price of transferring individuals and items across the nation. Transport additionally accounts for roughly one-tenth of South Africa’s greenhouse fuel emissions, so choices about how we construct and energy our automobiles matter for the local weather, too, not only for street security.
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I raised this argument in my opening tackle on the forty fourth Southern African Transport Convention, held from 6-9 July on the CSIR Worldwide Conference Centre in Pretoria – the nation’s largest annual gathering of transport engineers, researchers and authorities policymakers. This 12 months’s convention fell on a significant anniversary: 30 years of transport coverage in our democracy. Three a long time is lengthy sufficient to take an trustworthy take a look at what labored, and what we missed. One of many clearest issues we missed is that this: we let a genuinely world-class, homegrown security innovation sit inside our defence sector as a substitute of asking the way it may save lives on our highways.
To be exact about what this switch does and doesn’t imply: the proposal is to not weld armour plate into taxis. The added mass alone would value any such car out of a market the place operators compete on cents per kilometre. It’s to hold throughout the engineering self-discipline itself – the occupant safety specs, the stroking-seat load curves, the restraint-anchor geometry guidelines and the rollover structural requirements that a long time of army car programmes compelled into existence. These disciplines may be mandated in regulation at a value of lots of of rand per seat, not lots of of hundreds of rand per car.
Fixing that is subsequently not about inventing one thing new. It’s about political and institutional will: getting the CSIR, Armscor, Denel, the division of transport and car producers into the identical room, with a shared mandate to maneuver confirmed security information from the battlefield into civilian design requirements. I’ve proposed a sensible framework for precisely this, constructed round 5 priorities – sovereignty, security, safety, sustainability and resilience – with concrete actions over the following three years and the last decade past.
South Africans deserve a transport system that doesn’t quietly settle for 12 000 deaths a 12 months as the price of attending to work. We aren’t in need of experience. We’re in need of the bridge connecting what we already know easy methods to construct to the roads South Africans journey on every single day. That bridge is buildable. The one query is whether or not we select to construct it.
