Ground-level vehicular transit in GLMZ is dominated by autonomous fleet vehicles operating under franchise agreements with the city's corporate sovereigns. Private vehicle ownership has declined to approximately 8 percent of households — concentrated almost entirely in Tier-One and upper Tier-Two populations — while the remainder of the city's ground-level mobility is served by four major autonomous fleet operators: Nexus Mobility, Caldor Ground Division, Sable Fleet Services, and the smaller but influential Harmon Executive Transport. These operators collectively field approximately 340,000 active autonomous vehicles on the megacity's street grid, coordinated through a city-wide traffic management mesh called the GridMind system, operated under contract by Velorant Systems.

The fleet vehicle experience varies dramatically across operator and tier. Nexus Mobility's standard-tier pods — the ubiquitous white-and-grey capsules seen throughout the mid-tier districts — are functional, reliable, and surveilled. Every Nexus ride generates a detailed behavioral and biometric data package: route, duration, passenger identity, in-vehicle audio (terms of service consent is buried in the citizenship registration process), and a continuous neural-passive scan for passengers with registered interfaces. This data is retained for 18 months and is available to corporate security clients and MSA under standard information-sharing agreements. Nexus's service is cheap by design — the fare revenue is secondary to the data product. Sable Fleet Services, by contrast, operates a premium encrypted-pod service marketed explicitly to Tier-One executives and legal professionals who need ride confidentiality; Sable's data retention is contractually limited to 72 hours and is not shared with third parties. The price differential is roughly tenfold.

For Tier-Three and Tier-Four residents, ground-level autonomous transit presents a different set of problems. Nexus and Caldor both operate in lower-tier districts, but vehicle availability algorithms — which balance supply to demand weighted by fare revenue — consistently underserve these areas during peak hours. A Tier-Four resident in the Ashford Warren district faces average wait times of 23 minutes for a Nexus standard pod during morning rush, compared to 4 minutes in the Portsmith mid-tier commercial district three kilometers away. Caldor's pricing in Tier-Four zones includes a district surcharge that adds 40 percent to base fares, officially justified as reflecting infrastructure maintenance costs in lower-investment areas — a circular logic that effectively taxes poverty.

The informal ground transit sector fills the gaps left by franchise operators. Unlicensed human-driven vehicles — called runners or ghost cabs depending on neighborhood — operate throughout the lower-tier districts and sub-street approaches, offering cash-equivalent transactions and no biometric logging. Runner operators are a persistent enforcement target for MSA and for franchise operators' security contractors, who have a direct financial interest in suppressing competition. Despite periodic crackdowns, the runner economy persists because it serves a genuine mobility need that the licensed fleet system structurally fails to meet. Some runner networks have evolved considerable operational sophistication, including route coordination through encrypted mesh nodes and early-warning systems for MSA patrol patterns.