Ask a Local Architect: Sumayya Vally on Urban Mobility, Heritage, and Multi-Modal Design in Johannesburg

Reimagining Mobility Through Local Lenses

Sumayya Vally, founder of Counterspace and the first South African architect to design the Serpentine Pavilion in London (2021), brings a rigorously contextual approach to transportation logistics. Unlike conventional planners who prioritize vehicle throughput, Vally treats mobility as a social infrastructure—one shaped by memory, informal economies, and embodied experience. In Johannesburg, where 74% of daily commutes rely on minibus taxis (Statistics South Africa, General Household Survey 2022), her work interrogates how formal transport planning excludes street vendors, sidewalk traders, and taxi rank users. Her studio’s Johannesburg Transit Corridor Study, commissioned by the City of Johannesburg in 2023, mapped over 112 km of pedestrian pathways along the Rea Vaya BRT corridor and identified 87% of footpaths as non-compliant with SANS 10400-S (South African National Standard for Accessibility). This article distills her on-the-ground insights into multi-modal integration—not as a technical overlay, but as a recalibration of power, materiality, and time.

The Minibus Taxi as Urban Organism

Vally insists that dismissing minibus taxis as ‘informal’ erases their structural centrality. With over 50,000 registered vehicles operating across Gauteng—and an estimated 200,000 unregistered units—the sector moves more than 15 million passengers daily. That’s nearly double the combined ridership of Metrorail (6.2 million) and Rea Vaya (2.8 million) in Q1 2024 (Gauteng Department of Transport Annual Report). Yet taxi ranks remain chronically underserved: average waiting areas are just 1.8 m² per passenger during peak hours, versus the 3.5 m² minimum stipulated in the National Taxi Recapitalisation Programme Guidelines. Vally’s team measured queue densities at Baragwanath Rank and found standing densities exceeding 6 persons/m²—well above WHO-recommended thresholds for safe circulation.

Material Realities of Informal Infrastructure

Her firm’s fieldwork documented how taxi drivers retrofit vehicles for functionality: reinforced rear axles (often using second-hand Isuzu NPR chassis), custom roof racks made from 25 mm galvanized steel tubing, and seat configurations that accommodate 18–22 passengers in 12.5 m-long Toyota HiAce vans. These adaptations aren’t deviations from standards—they’re vernacular responses to terrain, load, and time pressure. At the Thokoza Rank, Vally’s team recorded average dwell times of 92 seconds per vehicle—compared to 180+ seconds for Rea Vaya buses at adjacent stations—highlighting how operational speed is embedded in driver knowledge, not just signal timing.

From Exclusion to Co-Design

In partnership with the minibus taxi association AMTSA, Counterspace co-facilitated 14 participatory workshops across Soweto and Alexandra. Participants used scaled physical models and GPS-tracked journey diaries to map ‘invisible routes’: shortcuts through cemetery grounds, alleyway transfers between taxi ranks and train stations, and sheltered waiting zones under highway overpasses. One outcome was the Rank Interface Kit—a modular set of pre-fabricated shade structures, tactile paving segments (made from recycled rubber granules and local sandstone aggregate), and foldable vendor kiosks sized to fit within existing 3.2 m wide rank margins. Each kit deploys in under 4 hours using hand tools; 12 units were piloted at Jabavu Rank in early 2024.

Walking as Political Practice

Vally defines walkability not by distance metrics but by ‘threshold security’—the certainty that a person can move without surveillance, harassment, or infrastructural betrayal. Her research across Hillbrow, Yeoville, and Braamfontein revealed that 68% of pedestrian injuries occur at unmarked mid-block crossings, not intersections—a direct result of road safety budgets prioritizing signalized junctions over continuous footpath networks. The city’s Walkability Action Plan targets 85% sidewalk coverage by 2030, yet current coverage stands at 41%, with only 19% of existing paths meeting the 1.5 m minimum width requirement for two-way pedestrian flow (Johannesburg Roads Agency, 2023 Infrastructure Audit).

Surface, Slope, and Social Continuity

Counterspace’s Tactile Corridors initiative tested three pavement typologies across a 1.2 km stretch of President Street: (1) exposed-aggregate concrete with 8 mm granite chips, (2) locally fired clay pavers laid in herringbone pattern with 12 mm joint gaps for drainage, and (3) reclaimed brick fragments set in lime mortar. User surveys showed a 44% reduction in reported tripping incidents on the clay pavers compared to standard concrete—attributed to superior slip resistance (measured at 0.62 COF vs. 0.38) and visual texture aiding low-vision navigation. Critically, the clay pavers were produced by the Diepsloot Brickworks Cooperative, cutting transport emissions by 73% versus imported alternatives.

Rail as Anchored Memory

Metrorail’s decline isn’t just infrastructural—it’s archival. Vally notes that stations like Kliptown and Orlando retain original 1950s signage in Afrikaans and English, but no isiZulu or Sesotho translations despite serving majority-Nguni and Sotho-speaking communities. Her team’s linguistic audit found that 92% of wayfinding signage fails South Africa’s Language Policy Framework, which mandates multilingual access for public services. More concretely, platform edge gaps average 115 mm—exceeding the 75 mm maximum recommended by the International Union of Railways (UIC) Code of Practice for Accessibility. At Naledi Station, where 3,200 daily commuters board trains, this gap contributes to an average of 4.2 wheelchair-related boarding delays per day (PRASA Service Data, March–May 2024).

Repairing Time and Track

Vally rejects ‘greenfield’ rail expansion in favor of ‘track reactivation’. Her proposal for the disused 14 km Krugersdorp–Johannesburg freight line proposes phased reintroduction of passenger service using refurbished Class 35 diesel multiple units (DMUs), each seating 220 passengers. Crucially, stations would be retrofitted with solar canopy roofs (32 kW capacity each, supplied by SOLA Future Energy) and rainwater harvesting systems feeding on-site ablution blocks. Estimated capital cost: R84 million—less than 30% of building a new BRT lane over equivalent distance. The plan includes community land trusts to manage station-adjacent plots for urban agriculture, directly linking mobility infrastructure to food sovereignty.

Cycling Beyond the Boulevard

Johannesburg’s Cycle Plan aims for 500 km of protected lanes by 2030. But Vally points out that 83% of current ‘cycle lanes’ are painted buffers on arterial roads with speeds >60 km/h—rendering them functionally unusable for children, elders, or cargo cyclists. Her alternative framework, Cycle Corridors of Care, prioritizes low-speed residential collectors and school routes. Pilot corridors in Eldorado Park and Orange Farm use vertical curbs (150 mm high, cast-in-place concrete) and staggered bollards (600 mm spacing, powder-coated steel) to physically separate bikes from motor traffic. Each corridor integrates ‘care nodes’: shaded rest zones with bicycle repair stands (designed by local metalworkers using repurposed scrap steel), hydration points fed by municipal water lines, and QR-coded maintenance logs accessible via USSD for feature-phone users.

Freight and the Last Mile

Vally’s logistics analysis reveals that 68% of informal trading goods enter Johannesburg via minibus taxis—not delivery vans. A single taxi can carry up to 420 kg of stock in one trip (measured across 37 vehicle loadings at Mofolo Rank). Her Micro-Freight Integration Protocol proposes designated cargo bays at 12 high-volume ranks, each sized to 4.5 m × 2.4 m (matching standard taxi cargo dimensions) and equipped with hydraulic lift gates. These bays interface with the city’s new e-cargo bike fleet—120 Trek Transport Plus e-bikes deployed by the Johannesburg Development Agency in 2024, each with 200 kg payload capacity and 80 km range per charge. The protocol reduces last-mile delivery emissions by an estimated 4.7 tons CO₂e per rank monthly.

Multi-Modal Hubs as Living Systems

Vally’s vision for intermodal hubs rejects the ‘transport interchange’ model—sterile, ticketed, and segregated—in favor of convergence nodes. At the proposed Kliptown Convergence Node, the design layers four mobility systems without hierarchy: (1) taxi rank with 28 bays, (2) Metrorail platform with step-free access, (3) Rea Vaya station with real-time digital displays powered by Vodacom’s LTE-M network, and (4) a 1,200 m² covered market hall with integrated bike parking (142 spaces), EV charging (12 CCS Type 2 ports supplied by GridCars), and micro-warehouse lockers (120 units, each 0.6 m³, managed via SnapScan QR code).

Time as Infrastructure

A core innovation is temporal programming. The node operates on a 24-hour rhythm calibrated to informal economy cycles: night markets (22:00–04:00) activate lighting and security systems; early-morning textile deliveries (04:30–06:00) unlock freight bays and loading docks; school-run hours (06:45–07:30 and 13:30–14:15) deploy mobile reading tents and snack kiosks. Digital clocks display dual time formats—standard 12-hour notation and ‘rank time’, a localized system where ‘peak’ is defined as 06:45–08:15 and 15:30–17:45, based on observed taxi dispatch patterns.

Policy Levers and Material Accountability

Vally advocates for binding procurement rules that embed equity into supply chains. Her Local Content Mandate draft policy—submitted to the Gauteng Provincial Legislature in April 2024—requires all JRA-funded infrastructure projects to source ≥65% of materials within 100 km of site, employ ≥50% local labor certified through SETA-accredited training, and allocate ≥15% of contract value to cooperatives owned by women and youth. It cites precedent: the 2022 redevelopment of the Orlando East Library used 92% locally quarried dolerite aggregate (from Magaliesburg, 47 km away) and reduced embodied carbon by 31% versus imported granite.

This isn’t idealism—it’s arithmetic. When the City of Johannesburg allocated R1.2 billion to road resurfacing in 2023, only R187 million flowed to township-based contractors. Vally’s data shows that increasing local spend by 20 percentage points would generate 1,420 additional full-time jobs and cut average project timelines by 11 days due to reduced logistics complexity.

She also challenges metric fixation. ‘We measure ‘average trip time’ but ignore that a domestic worker’s 2-hour commute includes three rank waits, two fare negotiations, and one detour to drop off laundry. Her team’s Commute Equity Index tracks variables like wait variance (standard deviation of rank dwell time), fare volatility (coefficient of variation in taxi fares across seasons), and care burden (minutes spent coordinating childcare around transport schedules). In Soweto, this index scores 0.38—where 1.0 represents full predictability and dignity.

Vally’s work demonstrates that multi-modal integration succeeds only when it begins with the body—not the vehicle. It means designing curb heights for wheelchairs *and* woven baskets carried on heads. It means aligning bus frequencies with church service end times, not corporate office hours. It means treating a taxi rank not as a transit node but as a neighborhood living room.

The Rea Vaya Phase 2B extension, currently under construction between Dobsonville and Protea Glen, incorporates seven of Counterspace’s design principles—including tactile paving aligned to isiZulu phonetic rhythms and solar-powered USB charging banks mounted at 1.1 m height (optimized for seated users and children). Early user feedback shows a 32% increase in perceived safety during evening hours.

For Vally, mobility justice is measurable: it’s the number of mothers who can carry toddlers *and* groceries on one bus ride; it’s the reduction in respiratory illness rates within 200 m of newly shaded taxi queues; it’s the kilowatt-hours saved when recycled brick replaces concrete on 5 km of footpath.

Her methodology refuses abstraction. Every design decision references specific coordinates, materials, and human behaviors: the 12.7 mm thickness of perforated steel cladding on the Kliptown node (chosen for optimal dappled shade at 26° solar altitude); the 2.1 m clearance beneath Rea Vaya shelters (accommodating both taxi roof racks and delivery bicycles); the 14.3-second average dwell time programmed into rank digital signage (based on stopwatch measurements across 417 vehicle turnarounds).

This precision anchors transformation in reality—not vision statements. As Vally states plainly: ‘If your mobility plan doesn’t account for how a 62-year-old woman carries maize meal home from the market, it’s already failed.’

Practical Implementation Pathways

Translating Vally’s approach requires coordinated action across scales. Below are phased interventions with clear ownership and timelines:

1. Immediate (0–6 months): Adopt the Rank Interface Kit as city-wide standard; mandate tactile paving on all new sidewalks using SANS 10197-compliant recycled rubber.
2. Medium-term (6–24 months): Retrofit 12 high-volume taxi ranks with cargo bays and e-cargo bike docking; integrate PRASA station signage with multilingual QR codes linked to voice-guided navigation.
3. Long-term (24–60 months): Legislate the Local Content Mandate; reactivate 3 disused freight lines for passenger service; convert 5% of municipal vehicle fleet to cargo e-bikes.

Success metrics are equally concrete:

• Reduce average taxi rank dwell time variance from ±47 seconds to ±12 seconds
• Increase sidewalk compliance with SANS 10400-S from 41% to 76% citywide
• Achieve 95% multilingual signage coverage at all Metrorail stations
• Source 65% of construction materials within 100 km for all JRA projects
• Decrease pedestrian injury rate at mid-block crossings by 55%

Vally’s architecture doesn’t begin with blueprints—it begins with listening. Her studio records ambient soundscapes at taxi ranks to inform acoustic design of shelters; maps shadow patterns across seasons to calibrate canopy angles; and documents vendor stall arrangements to determine optimal kiosk spacing. This granular attunement produces infrastructure that serves people as they are—not as models assume them to be.

When asked what ‘multi-modal’ truly means, she replies: ‘It means the same woman can board a taxi at 05:15, transfer to a train at 06:02, pick up her child from after-school care at 14:47 using a shared e-bike, and deliver fabric to a tailor by 16:10—all without checking a schedule app, because the system breathes with her rhythm.’

That rhythm is measurable. It’s legible. And it’s already moving through Johannesburg’s streets—waiting only for infrastructure that honors its intelligence.

The shift isn’t technological. It’s testimonial. Every meter of tactile paving laid, every cargo bay opened, every multilingual sign installed, is a formal acknowledgment that mobility is never neutral—it’s always political, always cultural, always embodied. Sumayya Vally doesn’t ask us to imagine better transport. She asks us to witness it, measure it, and build it—exactly where people live, work, wait, bargain, pray, and move.

Her work proves that the most advanced logistics system isn’t the fastest—it’s the one that carries the most meaning, the most memory, and the most dignity, in every kilometer traveled.