• Road Widening and Lane Expansion: National Highway 21 has seen significant road widening to handle increasing traffic between Rajasthan and Uttar Pradesh. Many stretches have been upgraded from single or intermediate lanes to wider two-lane or multi-lane roads. This expansion improves vehicle flow, reduces congestion, and ensures safer overtaking for heavy vehicles. Wider roads also support faster inter-state movement of goods and passengers.
• Improved Road Surface and Quality: Infrastructure development along NH 21 includes resurfacing with durable materials for better road strength and longevity. Smooth road surfaces reduce vehicle wear and tear and improve fuel efficiency. Enhanced pavement quality also ensures better driving comfort for long-distance travelers. These improvements make NH 21 more reliable during all seasons.
• Construction of Bypasses and Flyovers: To reduce traffic congestion in towns and semi-urban areas, bypass roads and flyovers are being developed along NH 21. These structures allow through-traffic to move without entering crowded local areas. Bypasses reduce travel time and minimize pollution within towns. Flyovers improve traffic management at busy junctions and intersections.
• Enhanced Safety Infrastructure: Safety upgrades form a major part of infrastructure development on NH 21. This includes clear road markings, reflective signboards, crash barriers, rumble strips, and proper lighting at critical points. Pedestrian crossings and speed-control measures near settlements improve safety for local residents. These measures help reduce accidents and promote disciplined driving.
• Better Drainage and Flood Management: Improved drainage systems are being implemented to prevent waterlogging during monsoon seasons. Proper side drains and culverts protect road surfaces from damage and ensure uninterrupted movement. Flood-resistant infrastructure increases the lifespan of the highway. This is especially important for rural and low-lying areas along the route.
• Development of Roadside Amenities: Infrastructure growth along NH 21 includes fuel stations, rest areas, food courts, vehicle repair centers, and parking zones. These facilities support long-distance travelers, transport operators, and tourists. Roadside amenities improve travel convenience and encourage highway-based commercial activity. They also generate local employment opportunities.
• Strengthening Connectivity with Other Roads: NH 21 is being integrated better with state highways, district roads, and nearby national highways. Improved junctions and access roads help smooth traffic movement. This connectivity boosts last-mile access for villages, towns, and industrial zones. Strong road networks enhance logistics efficiency and regional integration.
• Support for Economic and Industrial Infrastructure: Improved highway infrastructure attracts warehouses, logistics hubs, and small industrial units along NH 21. Better roads lower transportation costs and support supply chain efficiency. This encourages business growth and investment in nearby areas. Industrial development along the corridor supports long-term economic growth.
• Environmental and Sustainable Measures: Plantation drives, noise barriers, and eco-friendly construction practices are being introduced along NH 21. These measures reduce environmental impact and improve 
• Future-Ready Infrastructure Planning: Future plans for NH 21 include smart traffic systems, improved signage, and capacity enhancement. These upgrades aim to meet rising traffic demand between Rajasthan and Uttar Pradesh. Modern infrastructure ensures long-term efficiency and safety. NH 21 is gradually evolving into a strong inter-state development corridor.

National Highway 21 connecting Rajasthan to Uttar Pradesh is more than just a road; it is a catalyst for growth, connectivity, and development. It supports trade, tourism, employment, and social progress across regions. With ongoing infrastructure upgrades and future expansion plans, NH 21 will continue to strengthen inter-state ties. Its role in shaping economic and social landscapes makes it a vital national asset. As connectivity improves, the highway will remain central to regional transformation.