Denizli Sustainable Urban Mobility Plan (SUMP) has been developed to restructure mobility in Denizli in line with road safety, accessibility, and low-carbon objectives. Under current conditions, car ownership in Denizli stands at 231 cars per 1,000 inhabitants, 47% of intra-urban trips are made by private vehicles, and the public transport backbone—operated with a fleet of 343 buses—carries approximately 125,000 passengers per day. Against this baseline, the Plan has been designed as a measurable transformation programme that directly targets the reduced service reliability caused by mixed-traffic operations and the discontinuities in active mobility infrastructure.
The technical backbone of the SUMP is built on an integrated transport model developed through a “digital twin” approach. A digitally constructed four-step travel demand model was integrated with land-use dynamics to ensure that 2040 projections were generated on a robust analytical basis. Model accuracy was supported by comprehensive counting campaigns conducted at 24 critical junctions and 421 locations; a 12,778-km road network was quantified using lane–speed–capacity parameters, and an 88% level of consistency with observed field data was verified. As a result, investment priorities were anchored not in assumptions, but in performance evidence derived from observed conditions.
The implementation framework was defined using a portfolio logic, structured under eight measure packages comprising 66 measures and 425 projects, with the core of the transformation identified as the integration of public transport, active mobility, and ITS (AUS). The 2040 target set has been articulated through clear performance indicators, including an increase in the sustainable mode share from 31% to 53%, expansion of the cycling network to 155 km, and commissioning of a high-capacity backbone corridor totalling 68.3 km. For road safety, the Plan adopts a Vision Zero approach, targeting a reduction of fatalities from traffic crashes to zero and a substantial decrease in serious injuries.