This study investigates the complex interactions between operational and financial variables that influence infrastructure investment in Romania’s wastewater sector, a serious area for environmental sustainability and compliance with European environmental standards. Using a comprehensive dataset covering all regional water service operators, accounting for over 90% of the country’s population, across the period 2012–2022, the analysis employs dynamic panel data methods to examine how treated wastewater volumes, operating expenditures, revenues, tariffs and the number of connected users shape investment decisions and the modernization of wastewater infrastructure. The results reveal strong links between operational performance and investment behavior, indicating that revenues from wastewater services and efficiency in organic pollutant removal (CBO5) are key determinants of capital investment. The findings further show that an expanding user base generates substantial investment needs, supporting the extension and upgrading of wastewater treatment networks. By combining a dynamic econometric framework with a comprehensive national sample, the study makes an original contribution to the literature by providing robust empirical evidence on the interaction between financial performance, operational efficiency and sustainability objectives in the wastewater sector. The results underscore the importance of good financial planning, strategic management and sustainable investment policies, and offer relevant insights for policymakers, utility operators and researchers concerned with improving wastewater infrastructure performance under current economic and environmental challenges.

Public administrations increasingly use social media to communicate urban-planning decisions, creating observable spaces in which platform-engaged users express criticism, support, proposals, local knowledge, and evaluations of public authorities. Because such comments are self-selected and platform-specific, they cannot be treated as representative measures of city-wide public opinion. This study examines 3228 Facebook comment records associated with 82 posts published by the Municipality of Constanța, Romania, on mobility and transport, planning instruments and regulation, and public space and regeneration between 2016 and 2026. Using computationally assisted and manually supervised content analysis, the study distinguishes three complementary dimensions: comment-level social acceptance, modes of online community engagement, and planning legitimacy. Opposition accounted for 49.7% of comments, compared with 11.6% acceptance, while proposals or suggestions represented the most frequent participation mode (23.9%). Trust, corruption, and institutional credibility emerged as the dominant legitimacy frame (59.1%), followed by environmental and green value (44.4%), mobility and traffic (32.7%), and performance and feasibility (23.5%). All three policy domains recorded negative corpus-level Social Acceptance Index values, with the strongest opposition concerning planning instruments and regulation (−0.427). Within this bounded Facebook environment, the findings show that critical responses cannot be understood solely as rejection of urban interventions, because the corpus also contains substantive planning-relevant contributions and distinct claims about institutional and planning legitimacy.

Romania’s high-capacity road network remains fragmented despite sustained investment: the system expands but does not consolidate. Fragmentation is not primarily the result of insufficient funding, technical incapacity, or administrative delay, nor of mountainous relief alone. It emerges from the interaction between a geographically constrained territorial structure and a post-socialist institutional system required to deliver long linear infrastructure across multiple jurisdictions, legal regimes, and political cycles. The inherited spatial geometry persists; yet its articulation at high-capacity standard is uneven: corridors with lower implementation risk stabilise early, while cross-Carpathian links are delayed under cumulative constraint. Romania is analytically revealing because physical constraint and sequential institutional reform converge on the same alignments, producing not network failure but selective consolidation within a stable radial framework. In 1984, Pop described Romania’s road system as a structured territorial formation (Pop, 1984). Two concentric rings organised the country: an extra-Carpathian arc along the plains and borders and an intra-Carpathian ring enclosing the Transylvanian basin. From Bucharest, radial corridors connected the capital to all major regions, while the Carpathian arc functioned as the system’s central constraint. Roads followed river valleys, crossed the mountains at fixed passes, and paralleled the railway network. The hierarchy was explicit and the geometry was stable. The system was not high capacity, but it remained internally coherent. That territorial structure did not disappear after 1990. The main corridors, the mountain crossings, and the radial orientation towards Bucharest persisted. What changed was the institutional regime through which they were governed and extended: centralised territorial planning gave way to fragmented competences, restitution-based land regimes, decentralised permitting, European funding cycles, and contract-based implementation. Today, Romania’s high-capacity road network remains discontinuous. Some radial segments have been upgraded to motorway or expressway standard, while others remain incomplete. Trans-Carpathian links lag behind, and ring continuity is partial. Construction advances in isolated sections rather than through fully integrated corridors. This chapter argues that fragmentation does not result primarily from insufficient funding, technical incapacity, or administrative delay nor from mountainous relief alone. It emerges from the interaction between a geographically constrained territorial structure and a post-socialist institutional system required to coordinate long linear projects across jurisdictions, legal domains, and political time horizons. The inherited spatial logic persists, but its articulation at high-capacity standard operates under cumulative constraint. Romania is analytically revealing because physical constraint and sequential institutional reform converge on the same corridors. The result is not the disappearance of the inherited geometry but its selective consolidation: some axes stabilise early, while others accumulate delay. The analysis proceeds in six steps. It begins with the present configuration of the high-capacity network and then examines the geographic, temporal, legal, and normative dimensions that shape its evolution before turning to selected metropolitan case studies.