I noticed on the yellow arrow where the tail meets the arrow head on the left hand side (pointing to the #10) there is a bit of a blob that should be straightened out. The other arrows seem to be fine.
The arrow heads on the red dashed arrows all appear to be a bit different in shape. You should just choose one and copy it however many times you need it.
I would actually recommend letting Illustrator add your arrow heads for you so that they are consistent, rather than hand drawing them.
To add arrowheads to a line using Illustrator rather than drawing them yourself here are the instructions from Illustrator CS Help:
Adding arrowheads to lines
The Add Arrowheads command lets you add an arrowhead to either end of a selected line. If applied as a filter, the resulting arrowheads are distinct objects grouped with the line; the arrowheads can be edited and moved like any other grouped object. If applied as an effect, the arrows are similar to brush strokes; that is, the arrows change location, direction, and color along with the line, but they cannot be edited separately. For more information, see Comparing filters and effects.
If you apply this command from the Effect menu, you can use the Appearance palette to modify or remove the effect from your object. (See Modifying and removing appearance attributes.)
To add arrowheads to a line or container:
Select the line or group (or target a layer in the Layers palette).
To apply the command as a filter, choose Filter > Stylize > Add Arrowheads; to apply the command as an effect, choose Effect > Stylize > Add Arrowheads.
Choose from various arrowhead designs for the start and end of the line by clicking the forward and back buttons below the Start and End arrow boxes. The start and end of the line refer to the order in which the line was drawn.
To rescale the size of an arrowhead, enter the percentage you want in the Scale text box. This scales the arrowhead relative to the stroke weight of the line.
To preview the command in the document window, select Preview.
Illustrator does increase the size of the arrowhead as the stroke weight increases, so if you really want a smaller arrowhead and a heavier stroke like you have on your map, you can always apply the arrowhead to your line in the style you want, then hit "Expand" and then "Ungroup" a couple of times so that you can scale the arrowhead as needed.
EcoGraphic Designwww.EcoGraphic.ca Design is the intermediary between information and understandingRichard Grefe