1. On March 25, 1933, the Columbia River was officially designated as a highway for transportation. This designation allowed for the construction of dams and other infrastructure projects along the river, which helped to improve transportation and power generation in the region.

2. In 1950, the Oregon State Police established the first radio communication system in the state. This system allowed officers to communicate more efficiently and effectively while on patrol, which helped to improve public safety.

3. On March 25, 1964, the Oregon Department of Transportation was created as a separate agency from the Oregon Highway Commission. This new agency was responsible for overseeing all aspects of transportation in the state, including highways, bridges, and public transit.

4. In 1977, the Oregon State Legislature passed the Oregon Bottle Bill, which required retailers to collect a refundable deposit on beverage containers. This law was enacted to help reduce litter and promote recycling.

5. On March 25, 2010, the Oregon Senate passed a bill legalizing medical marijuana dispensaries in the state. This law allowed patients with a valid medical marijuana card to purchase cannabis from authorized dispensaries, which helped to improve patient access to medical cannabis.