Not sure where the $30/barrel comes from but its not true.
Link to eia website...you can take the numbers for real.
Cost to move via pipeline $5
By train. .....$10-15.
http://www.eia.gov/todayinenergy/detail.cfm?id=7270

Not arguing its not significant and rail should be freed up for other commodities. I wonder where rail infrastructure is manufactured...must be booming.