More Good News For Motorists This Week.The National Average Price For Regular Unleaded Gas Is $2.29 That’s A Monthly Savings Of 24 Cents Per Gallon. However, A Travel Organization Is Projecting Prices To Begin To Rise Across The County Soon. This Week, Tri Cities Motorists Are Paying On Average $1.96 Per Gallon For Regular Unleaded Gas, Which Is Down From $3.12 A Year Ago.