A development of 180 houses at this location would be a significant traffic generator at a location where there are already serious delays in peak periods.
For safety reasons exit from the development would need to be to Primrose Hill because traffic on the A429 the main road is too heavy at peak for an uncontrolled exit and traffic flow from the proposed estate too low to justify signals - a roundabout would not provide sufficient gaps for traffic to exit and a left only exit would create problems at the A429/A46 roundabout.
One hundred and eighty houses would generate of the order of 200+ vehicles between the hours of 0730 and 0830, that is a queue of nearly one and a half kilometres to be discharged onto and from Primrose Hill. With the likely destinations to be biased towards Leamington/Warwick and Coventry most will want to access the A429 roundabout which is already subject to delay and increasingly to incidents, low speed damage only mostly but a sigificant number. Increased delay will inevitably lead to a number of incidents being injury, rather than damage only incidents with consequent serious community cost.
Excepting the exit to the A46 from the A429, all secondary junctions for traffic leaving the proposed estate, such as St Johns and Spinny Hill/Emscote Road have serious delays already.
The A429 is the diversion route when the A46 has to be closed. Traffic conditions then clearly show how increases in traffic cause serious traffic disruption. Even the proposed signals at Emscote Road/greville Road will have little or no reserve, because the river bridge is a significant traffic limiter; assuming that a complete reconstruction to four lanes isn't economically viable
Without major junction developments there is no capacity for the generated traffic to discharge. Consequently there will exist a possibility of gridlock in the Spinny Hill, Emcote Road, St John/Coventry Road/Primrose Hill area which could extend as far as the A42 Birmingham Road with further consequences.