Motorists in Texas and across the country saw increases in gas prices for the second week in a row, according to the AAA Texas Weekend Gas Watch Report.

In Texas, the average price for a gallon of unleaded regular is up four cents from to $2.57 from $2.53. That increase is slightly higher from the national price increase; however, gas prices in Texas are still below the national average by a range of ten to 20 cents. Nationwide, prices increased three cents from $2.68 to $2.71.

This week, gas prices in Texas are14 cents lower than the national average.

Motorists in Houston and San Antonio are paying the least for a gallon of gas at $2.52, going up three cents in Houston and one cent in San Antonio since last week. With price increases of six cents this past week, El Paso drivers are paying the most at $2.68 a gallon.

According to a AAA Texas oil industry experts, several factors are contributing to the rise in price.

Analysts say there are two main factors affecting the price of gasoline at the pump: the economic recovery and the strength of the U.S. dollar. As the economy and the value of the U.S. dollar increase, gas prices will also rise.

Industry reports for February show manufacturing activity rose - a modest sign of sign of a strong recovery. Another gauge of the economy's strength - consumer spending - also increased slightly. As economic activity increases in areas like manufacturing and consumer spending. so will demand for oil and gasoline.

Increases in oil prices are showing up at gas stations, even though the more expensive oil has yet to affect the cost of gasoline currently available at the pumps. Oil is trading in the $80-per-barrel range on the New York Mercantile Exchange.

Analysts also say oil prices tend to change with the seasons. Usually, retail prices climb as the spring driving season approaches. Drivers can anticipate a steady, but sometimes small, climb in prices during early spring.

Nationally, the average 14-gallon tank will cost consumers $38 to fill up; in Texas, it's $36.