Enums.CurbApproach enumeration

The CurbApproach can be one of:

Constant	Description
`Enums.CurbApproachEitherSide`	`(0)` An either side curb approach.
`Enums.CurbApproachLeftSide`	`(1)` A left side curb approach.
`Enums.CurbApproachRightSide`	`(2)` A right side curb approach.
`Enums.CurbApproachNoUturn`	`(3)` A no U-turn curb approach.
`Enums.CurbApproachUnknown`	`(4)` An unknown curb approach, used when the approach is not determined.