The Delhi-Dehradun expressway's fourth segment, which would improve connectivity, is expected to open by May 2025. Saharanpur will be used in this project to connect two roads. Instead of five hours, a two-hour journey time is what is expected. This motorway will save fuel, lessen traffic, enhance connectivity between the two cities, and save time. It is projected that the project will cost Rs. 130 billion. On the motorway, light cars are permitted to go up to 100 kmph. After NH44, the longest highway spanning from north to south, this will be the second motorway, including a wildlife protection corridor. Connectivity Saharanpur, Baghpat, Muzaffarnagar, Shamli, and Delhi will all be connected by this motorway. Phases 1, 2, 3, and 4 of the 210-km Delhi-Dehradun road have six lanes each, whereas Phase 1 has twelve lanes. This motorway will link the three states of Uttar Pradesh, Delhi, and Uttrakhand. Issues One of the biggest challenges is the removal of trees. Because this motorway passes through Rajaji National Park, wildlife is seriously at risk. To halt the tree-cutting, some groups have filed lawsuits. The first segment of the Delhi-Dehradun motorway is anticipated to be operational by the end of June 2024. The project's first phase is 90?95% complete, although expansion joints, signs, and other infrastructure still need to be installed. Timeline of the construction The government grants approval for the NHAI project by February 2020. The land acquisition and tender allocation for the first two stages were completed in January 2021. The national government has set aside Rs 20 billion by November of that year to build six additional highways connecting Haridwar. By January 2022, tenders were open for the second phase of this expressway's construction. The environmentally sensitive Delhi-Dehradun motorway segment was completed by August.